加to-do-的动词

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动词后加todo和doing的记忆口诀

动词后加todo和doing的记忆口诀

动词后加todo和doing的记忆口诀展开全文一、只能用动名词(ing)作宾语[口诀]考虑建议盼原谅,承认推迟没得想。

避免错过继续练,否定完成停欣赏。

禁止想象才冒险,不禁介意弃逃亡。

consider考虑suggest建议/advocate 提倡主张look forward to 盼望forgive原谅/pardon 原谅acknowledge承认/admit 承认postpone延迟延期/delay 延迟/defer 拖延recall回想/fancy 幻想爱好avoid避免miss错过keep保持practise练习实践deny否认complete完成/finish 完成cease停止/quit 放弃停止appreciate感激欣赏forbid禁止/prevent 阻止imagine设想risk冒险can’t help 不禁mind介意escape逃跑逃避加动名词的动词大集合口诀(原创)故事是以一个家长的口吻讲述:我有时很感激欣赏(appreciate)我的孩子,但总是避免(avoid)承认(admit)这一点,请允许(allow)我寻求您的建议(advise),{名词为advice}您考虑(consider)后告诉我如何克服这个小缺点。

还有一件事,我的孩子总是拖延(delay)他不喜欢(dislike)的事,不可否认(deny)这就是逃避(escape)。

老师原谅(excuse)了他,但是告诫他要喜欢(enjoy)自己的该做的事。

我曾经禁止(forbid)他凭空想象(fancy)赶快完成(finish)自己手头的事,他反对我并保持(keep)他的想象(imagine),说介意(mind)自已会错过(miss)任何灵感。

有专家告诉我要允许(allow)孩子去实践(practise),去冒险(risk),因为孩子不能抵制(resist)自己闯的诱惑,只要建议(suggest)他忍受(stand)住任何学习工作的艰苦就可以了。

to do结构短语高中

to do结构短语高中

to do结构短语高中"To do"结构在英语中是非常常见的,它可以用作动词,也可以用来形成无人称的表达方式,或者用于提出问题。

下面是一些高中常见的"To do"结构短语及它们的中文翻译:1. To do homework - 做作业。

I have to do my homework before I can go out. 我得先做完作业才能出去。

2. To do well - 做得好。

She always wants to do well in her exams.她总是希望考试能考得好。

3. To do the dishes - 洗碗盘。

It's your turn to do the dishes tonight. 今晚轮到你洗碗了。

4. To do a favor - 帮个忙。

Could you do me a favor and pass me the salt? 你能帮我个忙,递给我盐吗?5. To do research - 做研究。

He has to do a lot of research for his science project.他得为他的科学项目做很多研究。

6. To do damage - 造成伤害。

The storm is expected to do significant damage. 预计暴风雨会造成严重的损害。

7. To do one's best - 尽某人最大的努力。

She always does her best to help her friends. 她总是尽力帮助她的朋友。

8. To do exercises - 做练习。

We have to do exercises to prepare for the test. 我们得做练习来为测试做准备。

9. To do business - 做生意。

后面加to do的短语总结

后面加to do的短语总结

后面加to do的短语总结1.Attempt to do:尝试做某事2.Agree to do:同意做某事3.Aim to do:旨在做某事4Appear to do:似乎做某事5Arrange to do:安排做某事6Aspire to do:渴望做某事7Attempt to do:企图做某事8Avail oneself to do:有益于做某事9Attend to do:注意做某事10Avail to do:有助于做某事11Bind to do:束缚做某事12 Care to do:愿意做某事13 Chance to do:碰巧做某事14Claim to do:声称做某事15Come to do:来做某事16 Consent to do:同意做某事17 Decide to do:决定做某事18 Demand to do:要求做某事19 Determine to do:决心做某事20 Desire to do:渴望做某事21 Expect to do:期待做某事22 Fail to do:未能做某事23 Fear to do:害怕做某事24 Forget to do:忘记做某事25 Happen to do:碰巧做某事26 Hope to do:希望做某事27 Intend to do:打算做某事28 Learn to do:学习做某事29 Manage to do:设法做某事30 Need to do:需要做某事31 Offer to do:主动提出做某事32 Plan to do:计划做某事33 Prepare to do:准备做某事34 Promise to do:承诺做某事35 Refuse to do:拒绝做某事36 Resolve to do:决心做某事37 Seem to do:似乎做某事38 Strive to do:努力做某事39 Volunteer to do:自愿做某事40 Wait to do:等待做某事这些短语中的 to do 表示的是动作的目的或意图。

动词后加to do的记忆口诀题目:

动词后加to do的记忆口诀题目:

动词后加to do的记忆口诀题目:动词后加to do的记忆口诀题目动词后加to do是英语语法中的一个重要规则,遵循这个规则可以帮助我们正确地构建句子。

为了记忆动词后加to do的规则,我们可以使用以下的记忆口诀:动词后加to do 的记忆口诀:1. 意愿、目的,加to更好。

2. 主观动词,加to是应。

3. 特殊动词,加to不可。

4. 感觉、祈使,加to牢记。

5. 使役动词,加to很正。

让我们来详细解析这个记忆口诀:1. 意愿、目的,加to更好。

意愿、目的,加to更好。

意愿动词(modal verbs)和表达目的的动词通常后面会跟随不定式,即动词前加to。

例如,want to do、plan to do等。

2. 主观动词,加to是应。

主观动词,加to是应。

一些表示个人主观感觉、意愿、态度的动词后面通常会加to,如prefer to do、decide to do等。

3. 特殊动词,加to不可。

特殊动词,加to不可。

有些常见的动词,如make、let、help等,在其后面的动词不需要加to。

例如,make a decision、let them go等。

4. 感觉、祈使,加to牢记。

感觉、祈使,加to牢记。

5. 使役动词,加to很正。

使役动词,加to很正。

使役动词(causative verbs)后面的动词需要加to。

使役动词包括have、get、make等。

例如,have him study、get them to help等。

以上是动词后加to do的记忆口诀,通过背诵和实际应用,你将更加熟悉这个规则,并能够更准确地构建句子。

记得多加练习,掌握这个规则的同时也要注意上下文的适用性。

动词后面加todo和doing的规则

动词后面加todo和doing的规则

动词后面加todo和doing的规则一、动词后面加todo的规则1. 不及物动词不及物动词是指不需要接受动作的动词,如:跳跃、奔跑、呼吸等。

当不及物动词后面加上todo时,表示计划或打算去做某事。

例如:- I want to do a lot of things, such as traveling around the world and learning a new language.- She loves dancing, so she wants to do ballet as her hobby.2. 及物动词及物动词是指需要接受动作的动词,如:吃、喝、看等。

当及物动词后面加上todo时,表示计划或打算去做某事,而不是实际进行这个动作。

例如:- I need to do my homework before going out to play with friends.- He wants to do some research on this topic to deepen his understanding.3. 动词短语有些动词是由动词和介词、副词或形容词构成的动词短语,如:look forward to、take care of、give up等。

当这些动词短语后面加上todo时,表示计划或打算去做某事。

例如:- She is looking forward to doing some shopping during the holiday.- They should take care of their health by doing exercise regularly.二、动词后面加doing的规则1. 不及物动词不及物动词后面加上doing表示正在进行某个动作。

例如:- She is swimming in the pool now.- They are playing basketball in the park.2. 及物动词及物动词后面加上doing表示正在进行某个动作,并且这个动作有对象。

动词后面加todo和doing的规则

动词后面加todo和doing的规则

动词后面加todo和doing的规则一、动词后面加todo的规则1. 一般现在时:动词原形 + do(es) + not + todo例如:- He does not do his homework.- They do not play football on weekends.2. 一般过去时:did + not + 动词原形 + todo例如:- She did not go to the party last night.- We did not eat breakfast this morning.3. 现在进行时:am/is/are + not + 动词ing + todo例如:- He is not studying for the exam.- They are not watching TV now.4. 过去进行时:was/were + not + 动词ing + todo- She was not cooking dinner at 7 p.m.- We were not playing basketball yesterday.5. 现在完成时:have/has + not + done + todo例如:- I have not finished my homework yet.- He has not seen the movie.6. 过去完成时:had + not + done + todo例如:- She had not visited her grandparents before. - They had not traveled abroad by then.7. 将来时:will + not + 动词原形 + todo例如:- We will not go to the party tomorrow.- He will not help you with your project.8. 过去将来时:would + not + 动词原形 + todo- She would not come to the meeting if it rains.- They would not buy the car if it is too expensive.二、动词后面加doing的规则1. 一般现在时:动词原形 + do(es) + doing例如:- He does not like doing homework.- They do not enjoy playing football.2. 一般过去时:did + 动词原形 + doing例如:- She did not spend time doing housework yesterday. - We did not spend much time doing exercise last week.3. 现在进行时:am/is/are + 动词ing + doing例如:- He is not studying English now.- They are not watching TV, they are doing homework.4. 过去进行时:was/were + 动词ing + doing例如:- She was not cooking dinner at 7 p.m., she was doing yoga. - We were not playing basketball, we were doing our math homework.5. 现在完成时:have/has + been + 动词ing + doing例如:- I have not been studying for a long time.- He has not been working on the project recently.6. 过去完成时:had + been + 动词ing + doing例如:- She had not been traveling for a month before she got sick.- They had not been practicing the piano for a long time.7. 将来时:will + be + 动词ing + doing例如:- We will not be going on a trip next month.- He will not be attending the conference next week.8. 过去将来时:would + be + 动词ing + doing例如:- She would not be coming to the party if she is busy.- They would not be staying at the hotel if it is not convenient.以上就是动词后面加todo和doing的规则,希望能对你有所帮助。

常与to-do-、doing搭配的动词

只能是d oing sth1、 enjoy d oing sth 享受做某事2、 finish d oings sth 结束做某事3、 practice d oing sth 练习做某事4、 mind doing sth 介意某事5、 be busy d oing sth 忙于做某事6、 have fun d oing sth 很开心做某事7、 have problems d oing sth 有问题做某事8、 have difficulties d oing sth 有困难做某事9、 have troubl e d oing sth 有麻烦做某事10、 spend some time doing sth 花时间做某事11、 prefer d oing sth to d oing sth 更喜欢做某事12、 be used to d oing sth 习惯于做某事13、 l ook forward to d oing sth 盼望做某事14、 be interested in d oing sth 有兴趣做某事只能是to d o sth15、 want to d o sth 想要16、 woul d like to d o 愿意17、 agree to d o 同意18、 refuse to d o 拒绝19、 d ecid e to d o 决定20、 plan to d o 计划21、 expect to d o 期望22、 hope to d o 希望23、 wish to d o 但愿to d o、 d oing 均可,但意思不一样24、 like to d o sth 喜欢马上去做某事25、 like d oing sth 平常喜欢做某事26、 prefer to d o sth 更喜欢马上去做某事27、 prefer d oing sth 平常更喜欢做某事28、 hate to d o 不喜欢马上去做某事29、 hate d oing sth 平常不喜欢做某事30、 try to d o sth 尽力去做某事31、 try d oing sth 试着去做某事32、 remember to d o sth 记得去做某事33、 remember d oing sth 记得做过某事34、 forget to d o sth 忘记去做某事35、 forget d oing sth 忘记做过某事36、 stop to d o sth 停下来去做某事37、 stop d oing sth 停下正做的事V+sb+to d o sth结构38、 woul d like sb to d o sth 愿意某人去做某事39、 like sb to d o sth 喜欢某人去做某事40、 want sb to do sth 想要某人去做某事41、 wish sb to d o sth 但愿某人去做某事42、 expect sb to d o sth 期盼某人去做某事43、 prefer sb to d o sth 更喜欢某人去做某事44、 all ow sb to d o sth 同意某人去做某事45、 encourage sb to d o sth 鼓励某人去做某事46、 advise sb to d o sth 建议某人去做某事47、 ask sb to d o sth 要求某人去做某事48、 tell sb to d o sth 告诉某人去做某事49、 get sb to d o sth 使得某人去做某事50、 invite sb to d o sth 邀请某人去做某事特殊结构51、 make sb d o sth 让某人去做某事52、 l et sb d o sth 让某人去做某事53、 have sb d o sth 让某人去做某事54、 help sb to d o sth 帮助某人去做某事55、 help sb do sth 帮助某人去做某事其他结构56、 stop sb from d oing sth 阻止某人去做某事57、 stop sb d oing sth 阻止某人去做某事58、 keep sb d oing sth 让某人一直做某事59、 keep sb from d oing sth 阻止某人去做某事60、 get sth d one 让某事被做。

哪些动词后面加to-do-哪些动词后面加doing

只能是doing sth1、enjoy doing sth[]享受做某事2、finish doing sth[]结束做某事3、practice doing sth[]练习做某事4、mind doing sth []介意某事5、be busy doing sth []忙于做某事6、have fun doing sth []很开心做某事7、have problems doing sth []有问题做某事8、have difficulty doing sth []有困难做某事9、have trouble doing sth[]有麻烦做某事10、spend some time doing sth []花时间做某事11、prefer doing sth to doing sth []更喜欢做某事12、be used to doing sth []习惯于做某事13、look forward to doing sth []盼望做某事14、be interested in doing sth []有兴趣做某事只能是to do sth15、want to do sth []想要16、would like to do []愿意17、agree to do []同意18、refuse to do []拒绝19、decide to do []决定20、plan to do[]计划21、expect to do[]期望22、hope to do[]希望23、wish to do[]但愿to doing均可,但意思不一样24、like to do sth[]喜欢马上去做某事25、like doing sth []平常喜欢做某事26、prefer to do sth []更喜欢马上去做某事27、prefer doing sth []平常更喜欢做某事28、hate to do []不喜欢马上去做某事29、hate doing sth[]平常不喜欢做某事30、try to do sth []尽力去做某事31、try doing sth []试着去做某事32、rember to do sth []记得去做某事33、rember doing sth []记得做过某事34、forget to do sth []忘记去做某事35、forget doing sth []忘记做过某事36、stop to do sth []停下来去做某事37、stop doing sth []停下正做的事V+sb+to do sth结构38、would like sb to do sth[]愿意某人去做某事39、like sb to do sth[]喜欢某人去做某事40、want sb to do sth []想要某人去做某事41、wish sb to do sth []但愿某人去做某事42、expect sb to do sth []期盼某人去做某事43、prefer sb to do sth []更喜欢某人去做某事44、allow sb to do sth []同意某人去做某事45、encourage sb to do sth []鼓励某人去做某事46、advise sb to do sth []建议某人去做某事47、ask sb to do sth []要求某人去做某事48、tell sb to do sth []告诉某人去做某事49、get sb to do sth[]使得某人去做某事50、invite sb to do sth []邀请某人去做某事特殊结构51、make sb do sth[]让某人去做某事52、let sb do sth[]让某人去做某事53、have sb do sth[]让某人去做某事54、help sb to do sth[]帮助某人去做某事55、help sb do sth[]帮助某人去做某事其他结构56、stop sb from doing sth[]阻止某人去做某事57、Stop sb doing sth阻止某人去做某事58、keep sb from doing sth[]阻止某人去做某事59、Keep sb doing sth让某人一直做某事60、get sth done[]让某事被做61、have it repaired[]让这个东东被修理62、have my ears pierced[]让我的耳朵穿孔63、have my hair cut[]让我的头发被剪64、weight himself[]自已量体重65、daily walk[]每天的散步66. monthly meeting[]每月的会议67、must be[]一定是68、at least[]至少n69、ask for permission[]请求同意70. the best route[]最好的路线71.as the days grow shorter and colder[]随着天气越变越冷71.normally casually actually[]正常地adv随意地adv事实上adv 73. make it worse[]使之更差。

加to-do-的动词

加to-do-的动词1)加to do 的动词 attempt 企图 afford 负担得起 arrange 安排 beg in 开始即pear似乎,显得hate 憎恨,厌恶 ask 问agree 同意 swear 宣誓 bear承受beg请求bother 扰乱;neglect 忽视 dema nd 要求long 渴望destine 注定 mean 意欲,打算 expect 期望omit 忽略,漏determi ne 决定 man age 设法pretend 假装need 需要 love 爱wish 希望dread 害怕 desire 愿望 volunteer 志愿 offer 提供 fail 不能 forget 忘t 记 happen碰巧 learn 学习 hesitate 犹豫 hope 希望 undertake 承接 赞同 intend 想要learn 学习烦恼care 关心,喜欢 decide 决定 choose选择 claim 要求start 开始 consent同意, decide 决定pla n 计划prefer 喜欢,宁愿 prepare 准备 regret 抱歉,遗憾 profess 表明promise 承诺,允许 want想要refuse 拒绝propose 提议 seek 找,寻觅 elect helptend例如: The driver failed to see the other car in time. He offered to help me. 他表示愿意帮助我。

2)下面的动词要求不定式做宾补:动词 ask 要求,邀请 allow 允许 announce 宣布 bride 收买 assist 协助 advise 劝告 authorize 授权, bear 容忍 beg 请求 compel 强迫 comma nd 命令 drive 驱赶 cause 弓丨起deserve 应受 get 请,得到 forbid 禁止 force 强迫 in spire 鼓舞 hate 憎恶 exhort 告诫, 委托help 帮助 implore 恳求 induce 弓丨诱try 试图 expectaim dema nd desire司机没能及时看见另一辆车。

to_do_与_doing_区别

(一)动词不定式:动词不定式由“to+ 动词原形”构成,如:to study, to play,动词不定式虽然不能作谓语动词用,但仍留着动词的特征,它可以带有所需要的宾语或状语而构成动词不定式短语,如:to study hard, to play table tennis。

1、动词不定式的形式变化:动词不定式有下列时态和语态的形式变化。

语态式一般式完成式进行式完成进行式主动to buildto have builtto be buildingto have been building被动to be build to have been build2、动词不定式的基本用法:动词不定式能起名词、形容词和副词的作用,可在句中作主语、表语、宾语补足语、定语和状语用,如:(1)作主语:To help each other is good.(动词不定式作主语时,一般可用it作形式主语,而将作主语的动词不定式置于句末,如:It is good to help each other.(2)作表语:My job is to drive them to the power station every day. 动词不定式在系动词be之后作表语,与表示将来时的be + 动词不定式结构有所区别,如:Our plan is to set up another middle school for the peasants’ children.我们的计划是给农民子弟再成立一所中学。

(句中的谓语动词为is,动词不定式to set up… 为表语,主语为plan,但plan并不是动词不定式的逻辑主语,即动词不定式to set up所表示的动作不是主语plan产生的。

)We are to set up another middle school for the peasants’ children.我们将为农民的子弟再成立一所中学。

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1) 加to do 的动词attempt企图neglect忽视afford负担得起demand要求long渴望arrange安排destine注定mean意欲,打算begin开始expect期望omit忽略,漏appear似乎,显得determine决定manage设法hate憎恨,厌恶pretend假装ask问dread害怕need需要agree同意desire愿望love爱swear宣誓volunteer志愿wish希望bear承受offer提供beg请求fail不能plan计划bother扰乱;烦恼forget忘记prefer喜欢,宁愿care关心,喜欢happen碰巧prepare准备decide决定learn学习regret抱歉,遗憾choose选择hesitate犹豫profess表明claim要求hope希望promise承诺,允许start开始undertake承接want想要consent同意,赞同intend想要refuse拒绝decide决定learn学习propose提议seek找,寻觅try试图aim demand desire elect help tend expect例如:The driver failed to see the other car in time. 司机没能及时看见另一辆车。

He offered to help me. 他表示愿意帮助我。

2)下面的动词要求不定式做宾补:动词+宾语+动词不定式ask要求,邀请get请,得到prompt促使allow允许forbid禁止prefer喜欢,宁愿announce宣布force强迫press迫使bride 收买inspire鼓舞request请求assist协助hate憎恶pronounce断定,表示advise劝告exhort告诫,勉励pray请求authorize授权,委托help帮助recommend劝告,推荐bear容忍implore恳求remind提醒beg请求induce引诱report报告compel强迫invite吸引,邀请,summon传唤command命令intend想要,企图show 显示drive驱赶mean意欲,打算train训练cause引起instruct指示require要求deserve应受leave使,让tell告诉direct指导like喜欢tempt劝诱entitle有资格order命令warn告诫enable使能够need需要urge激励,力说encourage鼓励oblige不得不want想要condemn指责,谴责lead引起,使得teach教entreat恳求permit允许wish希望3)加doing的动词acknowledge承认,自认cease 停止mention说到,讲到admit 承认tolerate忍受dislike不喜欢,讨厌advocate:提倡,主张complete完成dread可怕appreciate 感激,欣赏confess坦白endure忍受avoid避免contemplate细想enjoy享有,喜爱bear忍受defer拖延envy嫉妒can’t help不禁delay延迟escape逃跑,逃避can’t stand受不了deny否认excuse借口consider 考虑detest嫌恶fancy幻想,爱好favor 造成,偏爱mind 介意repent悔悟figure描绘,计算miss错过resent怨恨finish完成,结束不得pardon原谅,饶恕resist抵抗,阻止forgive原谅permit 允许resume恢复imagine设想postpone延迟,延期risk冒险involve卷入,包含practise 实行,实践suggest建议hate讨厌prevent阻止save营救,储蓄keep保持quit放弃停止stand坚持,忍受loathe非常讨厌,厌恶recall回想例如:I appreciate having been given the opportunity to study abroad two years ago.我很感激两年前给我出国学习的机会。

1. feel like+V-ing2. enjoy/like+V-ing3. stop doing sth.4. stop/prevent/keep from+V-ing5. finish+V-ing6. It’s another way of+V-ing7. spend…( in )+V-ing8. hear/see sb.+V-ing9. be good at+V-ing 10. be busy+V-ing 11. be worth doing sth. 12. go / keep on+V-ing 13. What/How about doing sth. 14. Thanks for doing sth 15. prefer doing sth.. to doing sth.16. forget doing sth. 17. remember doing sth. 18. instead of doing sth. 19. hate/dislike doing sth.20. be used for doing sth. 21. be/become interested in doing sth. 22. Would you mind doing sth.?23. have fun doing sth. 24. practise doing sth 25. better than doing ssth.26. do well in+V-ing 27. 介词后面的动词要用V-ing形式,如:another way of doing sth.28.动名词做主语用V-ing形式,如:Reading in bed is bad for your eyes.4)有些动词后使用动名词和动词不定式作宾语的差别1)forget to do 忘记要去做某事(此事未做)forget doing忘记做过某事(此事已做过或已发生)2)stop to do 停止、中断(某件事),目的是去做另一件事stop doing 停止正在或经常做的事3)remember to do 记住去做某事(未做)remember doing记得做过某事(已做)4) regret to do对要做的事遗憾regret doing对做过的事遗憾、后悔5)try to do努力、企图做某事try doing试验、试一试某种办法6) mean to do打算,有意要…mean doing意味着7)go on to do 继而(去做另外一件事情)go on doing 继续(原先没有做完的事情)8)propose to do 打算(要做某事)proposing doing建议(做某事)9) like /love/hate/ prefer +to do 表示具体行为;+doing sth 表示抽象、倾向概念(注)如果这些动词前有should一词,其后宾语只跟不定式,不能跟动名词。

例如:I should like to see him tomorrow.10) need, want, deserve +动名词表被动意义;+不定式被动态表示“要(修、清理等)”意思。

D on’t you remember seeing the man before?你不记得以前见过那个人吗?You must remember to leave tomorrow.你可要记着是明天动身。

I don’t regret telling her what I thought.我不后悔给她讲过我的想法。

(已讲过)I regret to have to do this,but I have no choice.我很遗憾必须这样去做,我实在没办法。

(未做但要做)TO的不定式短语和TO DOING短语下列动词或词组后面都可以接doing:admit 承认appreciate 感激avoid 避免complete完成consider认为delay 耽误deny 否认detest 讨厌endure 忍受enjoy 喜欢escape 逃脱fancy 想象finish 完成imagine 想象mind 介意miss 想念postpone推迟practice 训练recall 回忆resent 讨厌resume 继续resist 抵抗risk 冒险suggest 建议face 面对include 包括stand 忍受understand 理解forgive 宽恕keep 继续例如:Would you mind turning down your radio a little, please? 你把收音机音量调小一点,好吗The squirrel was lucky that it just missed being caught. 这松鼠幸运得很,刚逃避了被逮住的厄运。

admit to prefer…to be used to lead to devote oneself toobject to stick to no good no use be fond of look forward tobe proud of be busy can't help be tired of be capable ofbe afraid of think of burst out keep on insist oncount on set about put off be good at take upgive up be successful in需要省略to的不定式的情况有:1)情态动词(除ought 外)后。

2)使役动词let, have, make后,感官动词see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后。

注意:被动语态中不能省去to。

例如:I saw him dance. 我看见他跳舞。

=He was seen to dance.The boss made them work the whole night. 老板让他们整夜干活。

=They were made to work the whole night.3)would rather,had better句型后4)Why… / why no…句型后5)help 后可带to,也可不带to, help sb (to)do sth:6)but和except后。

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