【尚友制造】Avantasiad 的考点总结之时态

标题：Avantasiad 的考点总结之时态

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时态

1.at that time + 一般过去时; within the past few year+现在完成时

2.有before+过去时间不一定就加过去完成时, 应该从逻辑上面判断时态.

3.具体时间状语出现(尤其是封闭的时间段), 基本上只可用一般过去时, OG203: has occurred between 1982

and 1987 x “since the period of time covered began and ended in the past, the verb should in一般过去时.

4.把两个时态换成一个, 会造成逻辑顺序的不清晰(把”过去完成时+过去时”换成”过去时”), OG32AB.

5.现在完成时包含对现在影响的含义, 不可轻易换成过去式; 现在完成时强调的过去一直到现在, 但不表示

对将来有任何暗示, 不同于一般现在时, OG88BC(同时应该注意未划线部分的提示), 同理OG77DE, OG213D.

6. 现在完成时和一般过去时应该都可以连用in the last year, 不过现在完成时表示和现在有联系, 一般过去时

表示和现在无联系; whithin/ during/ over/ in+the past/ last/ recent+时间短语, 这样的形式通通用完成时, 主要看那个the在不在, "Last year" and "in the last year" are very different in meaning. "Last year" means the year before now. "In the last year" means from 365 days ago until now; 但是这不意味着有了the就一定用完成时, 大全968.

7. 现在完成时的谓语, 前面不能是现在完成时或者过去时的主语, OG30AB.

8. 主句的谓语动词如果是过去时态, 而间接引语是客观事实或说话人认为是事实时, 或者统计数据和科研成

果, 或者政府决策的时候, 间接引语谓语动词应用一般现在时, 例如:

OG147. At a recent session, the French government decided that (Paris needs a second, larger opera house to complement the famous Paris Opera).

大全99. Although the manager agreed to a more flexible work schedule, he said that (it must be posted on the bulletin board so that both management and labor will know what everyone) is assigned to do.

但是除了上述情况外, 一般都是动词是过去时, 则宾语从句要是过去时.

9. We use the Present Perfect to say that an action happened at an unspecified time before now. The exact time is not important. You CANNOT use the Present Perfect with time expressions such as "yesterday," "one year ago," "last week," "when I was a chlid," "when I lived in Japan," "at that moment," "that day" or "one day." We CAN use the Present Perfect with expressions like "ever," "never," "once," "many times," "several times," "before," "so far," "already" and "yet."; Sometimes we want to limit the time we are looking in for an experience. Expressions such as "in the last week," "in the last year," "this week," "this month," "so far" and "up to now" can be used to narrow the time we are looking in for an experience; Unlike the Present Perfect, it is possible to use specific time words or phrases with the Past Perfect. Although this is possible, it is usually not necessary.

10. 从句不可用将来时: No Future in Time Clauses: Like all future forms, the Simple Future cannot be used in clauses beginning with "when", "while", "before", "after", "by the time," "as soon as," "if" and "unless."

Eg. When you will arrive tonight, we will go out for dinner x

I already told Mark that when he would arrive, we would go out for dinner. x

11. 条件从句(分为真实条件句和非真实条件句)

1三种用法:

a. if x happens, y will happen, 主将从现, OG37.

b. if x heppens, y happen, 表达对一般事实的推测, OG46.

c. If it were表示虚拟的语气, 后面用could/ woul

d.

2在真实条件句中不用would用should, OG73B的解释中说明这是因为避免和虚拟语气重复.

3unless引导的也是条件从句, 不可以在从句中出现将来时, OG146B.

4would用法: 情态动词, 主要针对would和should, 用法分为情态动词的用法和非情态动词用法, 例如: If I were you, I would choose that one, 这里的would没有任何含意, 只是表达一种不确定的可能性, 是一种虚拟语气, 即非真实性条件句, 但是OG73中的would就是一种情态动词的意义, refer to a promised but uncertain future event.

12. 在没有十分的把握的情况下(除非逻辑意思需要或者有明显的主从关系), 小心使用过去完成时, OG80, 完成时的问题相当复杂, 句中一定要有时间提示或者动词关系提示, 否则不能选.

13. 大全497. Many of them chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with hundreds of monasteries.

(D) The mountainous regions of northern Ethiopia are dotted with hundreds of monasteries, many of which are chiseled from solid rock centuries ago.

(E) The mountainous regions of northern Ethiopia are dotted with hundreds of monasteries, many of them chiseled from solid rock centuries ago

D的时态不对, 后面有明显的时间状语提示, 独立结构可以绕过这个缺点.

14. can不可以用在过去时中, 要变成could.

15.出现ago, 由于表示过去具体时间, 最好不搭配完成时, 大全110AE.