if条件状语从句 PPT课件
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if 条件状语从句 课件
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练一练：
1。如果你请求他，他会帮你的 If you ___him, he ___ ____you 2。如果她早点儿起床，就有时间在家里吃早餐 If she____ ____a little earlier, she’ll have time to eat breakfast at home. 3。如果你参加聚会，你将会过得很开心。 If you____ the party ,you_____ ____ a great time. 4。如果明天下雨，我们将不去野餐 If it ____tomorrow, we _____ _____ for a picnic. 5。如果你经常听英文歌，你将会喜欢英语 If you often _____ ____English songs,you___ ___English.
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用法：
1. 如果主句是一般将来时，从句则用一般现在时。
If it rains（从句）， I will stay at home. I’ll go with you if you don’t want to go alone（从句）.
2.如果主句含有must, may, can 等情态动词，从句也要用
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Please call me if he comes next Sunday.
4.表示假设，表示将会发生和可能发生的事，
或进行提醒警告。 If +句子（一般现在时），+主句（主语will/may/can) +动词）
If you finish your homework , you can go out and play. If I have enough money next year , I will go to travel .
练一练：
1。如果你请求他，他会帮你的 If you ___him, he ___ ____you 2。如果她早点儿起床，就有时间在家里吃早餐 If she____ ____a little earlier, she’ll have time to eat breakfast at home. 3。如果你参加聚会，你将会过得很开心。 If you____ the party ,you_____ ____ a great time. 4。如果明天下雨，我们将不去野餐 If it ____tomorrow, we _____ _____ for a picnic. 5。如果你经常听英文歌，你将会喜欢英语 If you often _____ ____English songs,you___ ___English.
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用法：
1. 如果主句是一般将来时，从句则用一般现在时。
If it rains（从句）， I will stay at home. I’ll go with you if you don’t want to go alone（从句）.
2.如果主句含有must, may, can 等情态动词，从句也要用
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Please call me if he comes next Sunday.
4.表示假设，表示将会发生和可能发生的事，
或进行提醒警告。 If +句子（一般现在时），+主句（主语will/may/can) +动词）
If you finish your homework , you can go out and play. If I have enough money next year , I will go to travel .
人教版中考英语复习if引导的条件状语从句课件（共29页)
he,have free time, go to Shanghai ,
If he has free time, he will go to Shanghai.
she, study hard, she, get good grades
If she studies hard, she will get good grades.
--I’ll stay at home and watch TV.
A. rain
B. rains
C. will rain
D. is raining
B
summary
if 条件句不一般, 几个要点记心间; 条件句,放在前, 逗号要放句中间。 条件句表可能， 主将从现不一般； 条件句表事实， 主句常用现在时 If还有“是否”意 , 宾语从句放后边
“主情从现”
3. if 条件状语从句中，主句是祈使句， 从句用_一__般__现__在__时___表示将来。 主__祈__从__现___原则。
例如：Don’ t wait for me if I _a_m___ (be) late.
if 引导的条件状语从句时态
主将从现 祈使句 情态动词
I will sing a song if I am happy.
也可以放在主句后。 从句位于主句之前时，常用逗号将其与主句隔开。
原句可改为：
I’ ll finish it before I go to bed if I start after dinner
三， 含if条件状语从句的主从复合句 的时态
1. if 条件状语从句中，主句用一般将来 时，从句用一__般__现__在__时___表示将来 主__将_从__现___原则。
高考英语if条件状语从句课件(共34张PPT)
If条件句：条件句用于陈述语气，表示假设的情况可能发生，
其中 if 是“如果”的意思。
构 成
条件从句
主句
时 态
If＋一般现在时 主语＋shall/will+动词原形
例 句
If he comes,
he will take us to the zoo.
用法：
1. 如果主句是一般将来时，从句则用一般现在时。
3. 如果主句是祈使句，从句同样要用一般现在时。
Don’t go and play football if you don’t finish your homework.
Please call me if he comes next Sunday.
4.表示假设，表示将会发生和可能发生的事，
或进行提醒警告。 If +句子（一般现在时），+主句（主语will/may/can) +动词）
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
If 条件状语从句（1）
句型结构
祈使句+if条件状语从句 if条件状语从句，+祈使句（从句后加逗号）
时态
果不早点起床，上学就会迟到。
2. If I play games on it , it will go wrong .
如果我用它玩游戏，它就会坏掉。
3. If you finish the homework， you can go home． 如果你作业做完了就可以回家了。
4. If you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。 5.If you heat ice it turns to water. (也可用will turn) 如果把冰加热，它就会化成水。
if-条件状语从句复习课件
with her. is
won’t argue
5.I want to know if he _________(come) tomorrow, if he _______(come), I __________(give) the massage to him.
will come
comes
will give
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t
第17页，共21页。
A: Oh! But ___if__ you don’t go to the party,
you __w_i_ll__ miss all the fun!
B: I know, but I got into a _f_ig__h_t with my
parents.
A: Hmm… then you should just says_o_r_r_y_
to your parents.
B: I guess you’re right. I w__il_l ___ talk to
them tonight.
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第18页，共21页。
3. Use your imagination! What will you do if…
一般现在时。 If you drive too fast, you may have an accident.
You must stop if the traffic is red. If you finish the homework， you can go home． 如果你作业做完了就可以回家了。
meeting, teenagers, video, experience
1. If my family travels to a new country
if引导的条件状语从句.优秀精选PPT
① If you help me, I'll finish my job soon. (也可用will turn)如果把冰加热，它就会化成水。 （4）用含介词with或without的介词短语转换。 （3）当主句含有情态动词时，if引导的条件状语从句通常用一般现在时。 如果你做完了作业，你现在可以回家了。 He ____will write (write) a letter to his grandparents if he ___gets_(get) his report card this week. 在复合句中：⑴ 当主句是一般现在时或是一般将来时时； If 引导的条件状语从句 如果 if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。
件状语从句通常用一般现在时。
We
must study hard if we want to pass the final exam. 如果想通过期末考试，我们必须努力 学习。
祈使句时；（3）当主句含有情态动词时，if引导的条件状语从句通常用 一般现在时。如：
• If she doesn’t come, she will be sorry. 如果她不来，她会遗憾的。 • Have a good rest if you are tired. 如果累了，你就好好休息一下。 • We must study hard if we want to pass the final exam. 如果想通过期末考
④ 主句为一般现在时时态，if从句用 It’s dangerous if you play with the knife.
一般现在时态。（主现从现
玩儿刀是危险的。
• If you do, you’ll be sorry.
件状语从句通常用一般现在时。
We
must study hard if we want to pass the final exam. 如果想通过期末考试，我们必须努力 学习。
祈使句时；（3）当主句含有情态动词时，if引导的条件状语从句通常用 一般现在时。如：
• If she doesn’t come, she will be sorry. 如果她不来，她会遗憾的。 • Have a good rest if you are tired. 如果累了，你就好好休息一下。 • We must study hard if we want to pass the final exam. 如果想通过期末考
④ 主句为一般现在时时态，if从句用 It’s dangerous if you play with the knife.
一般现在时态。（主现从现
玩儿刀是危险的。
• If you do, you’ll be sorry.
条件状语从句完整课件
4．provided that…. / providing (that ) conj．假若
"provided / providing ＋（that）从句"表示一种 假设条件。 He will sign the contract provided (that) we offer more favorable terms． 如果我们提出更优惠的条件，他就会在合同上签 字。 He won't be against us in the meeting providing (that) we ask for his advice in advance． 如果我们提前征求一下他的意见，他就不在会上 反对我们。
如果你作业做完了就可以回家了。 If you have finished the homework， you can go home.
1. If 从句 （一般现在时）， 主句 （ 一般现在时 ）
表示科学常识，说明， 经常性的动作，倾向 自动会发生的事 1. If water is heated, it turns to steam. 2. If people don’t get enough sleep, their thinking ability is reduced . 3. If I need a haircut, I usually go to the barber’s near where I live. 4. People often don’t go out on Sundays if it rains.
2．表示将来的可能性，能力， 允诺， 命令，要求，请求，建议时， 运用“主将从现”的原则。
1. If I get the job, I’ll buy a mobile phone. 2. If my homework is difficult, I’ll ask Helen to help me. 3. If I have time this afternoon, I’ll go to the barber’s to get a haircut.
If引导的条件状语从句ppt课件
Please call me if you go shopping next Sunday.
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If 引导的条件状语从句
If I go there，I'll take her some flowers. We'll stay at home if it rains tomorrow. Please call me if he’s at home.
9.Hurry up！Or you ______(be)late again.
The teacher will be angry if he is late.
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If 引导的条件状语从句
If引导的条件状语从句与unless引导的条件状语从句的转换
If+否定形式=unless+肯定形式
You won’t pass the exam if you don’t work hard. =You won’t pass the exam unless you work hard.
If you don’t go to bed earlier,you will feel tired in the morning. =Unless you go to bed earlier,you will feel tired in the morning.
If it doesn’t rain,he will play with me tomorrow. =Unless it rains,he will play with me tomorrow.
If she doesn’t come,I’ll go shopping alone. =Unless she comes,I’ll go shopping alone.
初中英语语法 if 引导的条件状语从句的基本用法课件
If 意为“如果”，引导条件状语 从句，表示假如从句的动作发 生，主句的动作就(不)会发生。
If it doesn't rain, I will go to the cinema tomorrow.
从句位置灵活，可放在主句之 前，但要用 逗号与主句隔开；也 可放在主句之后。
My mother will take me to the park if she is free.
If he has free time, he will go to Shanghai.
If 引导的条件状语从句------句型转换
1. 借助“祈使句+and/or+句 子”来转换 (and 表顺承， or 表转折) If you study hard, you will pass the exam easily. = Study hard, and you will pass the exam easily. = Study hard, or you won’t pass the exam.
if引导的条件状语从句，在if 引导条件状语从句中要用现 在时态替代将来时，类似还 有连词before，as soon as， while，when等。
2. if 条件状语从句中，如果主句有 must，can，may 等情态动词，从
句用_一__般__现__在__时__。
例如：You must stop if the traffic light ___is_ (be) red.
3. if 条件状语从句中，主句是祈使句， 从句用__一___般__现__在___时表示将来。 主___祈__从___现_原则。
例如：Don’ t wait for me if I __a_m__ (be) late.
If it doesn't rain, I will go to the cinema tomorrow.
从句位置灵活，可放在主句之 前，但要用 逗号与主句隔开；也 可放在主句之后。
My mother will take me to the park if she is free.
If he has free time, he will go to Shanghai.
If 引导的条件状语从句------句型转换
1. 借助“祈使句+and/or+句 子”来转换 (and 表顺承， or 表转折) If you study hard, you will pass the exam easily. = Study hard, and you will pass the exam easily. = Study hard, or you won’t pass the exam.
if引导的条件状语从句，在if 引导条件状语从句中要用现 在时态替代将来时，类似还 有连词before，as soon as， while，when等。
2. if 条件状语从句中，如果主句有 must，can，may 等情态动词，从
句用_一__般__现__在__时__。
例如：You must stop if the traffic light ___is_ (be) red.
3. if 条件状语从句中，主句是祈使句， 从句用__一___般__现__在___时表示将来。 主___祈__从___现_原则。
例如：Don’ t wait for me if I __a_m__ (be) late.
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If从句（条件状语从句）
If it is fine tomorrow, I will climb the mountain.
If it is sunny this weekend, what will you do ?
If it is sunny this weekend, I __w_i_ll_p_l_a_y__ football with my classmates.
If you feel hungry, you should eat something.
If you feel tired, you must have a rest.
Look and say
If I’m ill, _I_w_i_l_l _s_e_e__a_d_o__c_to__r_.
If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
practice
If you are free this weekend, what will you do ?
sleep
If I am free ,… watch TV
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I _W__o_n_’_t _s_ta_y__a_t_h_o_m__e____.
If it is sunny this weekend, I _w__o_n_’_t _w_a_t_c_h_t_e_le_v_i_s_io_n__.
（“主”将从“现”）
If I get up late, I will be =I will be late for
late for school.
school if I get up
If I don’t finish my homleawteo.rk,
I won’t go to bed.
Байду номын сангаас
• 1.主将从祈
If you are ill, you should go to see a doctor.
If you are riding a bike in the street, you must be very careful.
If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
(not wait ) for him.
3. If you _b_u_y_ (buy) a new camera, __g_et_ (get)
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
play computer games
Complete the sentences with the correct form of the words.
1.If you __li_s_te_n__(listen) to the music, _b_u_y__ (buy) a CD.
2. If he___is___ (be) late for school,d_o_n_’t_w__ait
• 2.主将从现 if… will/won’t
• 3.主情（can，may，should，must）从 现
Look and say
If I’m hungry,
I will_e_a_t_s_o_m__e__fo_o_d__.
If I’m tired,
I will__h_a_v_e_a__r_e_s_t __.
e.g. 1.If you don’t get up early, you will be late for school .你如
果不早点起床，上学就会迟到。
2. If you finish the homework， you can go home． 如果你作业做完了就可以回家了。
If you have enough pocket money, what will you buy?
• If I have enough pocket money, • I ____________________.
Grammar 条件状语从句
由if引导的从句叫条件状语从句，if意为“如果” 当主句是一般将来时时，if引导的从句必须用现 在时来表示将来可能发生的动作或存在的状态。
If it is fine tomorrow, I will climb the mountain.
If it is sunny this weekend, what will you do ?
If it is sunny this weekend, I __w_i_ll_p_l_a_y__ football with my classmates.
If you feel hungry, you should eat something.
If you feel tired, you must have a rest.
Look and say
If I’m ill, _I_w_i_l_l _s_e_e__a_d_o__c_to__r_.
If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
practice
If you are free this weekend, what will you do ?
sleep
If I am free ,… watch TV
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I _W__o_n_’_t _s_ta_y__a_t_h_o_m__e____.
If it is sunny this weekend, I _w__o_n_’_t _w_a_t_c_h_t_e_le_v_i_s_io_n__.
（“主”将从“现”）
If I get up late, I will be =I will be late for
late for school.
school if I get up
If I don’t finish my homleawteo.rk,
I won’t go to bed.
Байду номын сангаас
• 1.主将从祈
If you are ill, you should go to see a doctor.
If you are riding a bike in the street, you must be very careful.
If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
(not wait ) for him.
3. If you _b_u_y_ (buy) a new camera, __g_et_ (get)
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
play computer games
Complete the sentences with the correct form of the words.
1.If you __li_s_te_n__(listen) to the music, _b_u_y__ (buy) a CD.
2. If he___is___ (be) late for school,d_o_n_’t_w__ait
• 2.主将从现 if… will/won’t
• 3.主情（can，may，should，must）从 现
Look and say
If I’m hungry,
I will_e_a_t_s_o_m__e__fo_o_d__.
If I’m tired,
I will__h_a_v_e_a__r_e_s_t __.
e.g. 1.If you don’t get up early, you will be late for school .你如
果不早点起床，上学就会迟到。
2. If you finish the homework， you can go home． 如果你作业做完了就可以回家了。
If you have enough pocket money, what will you buy?
• If I have enough pocket money, • I ____________________.
Grammar 条件状语从句
由if引导的从句叫条件状语从句，if意为“如果” 当主句是一般将来时时，if引导的从句必须用现 在时来表示将来可能发生的动作或存在的状态。