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名师串讲综合英语(二)(珍藏版)20

山西自考网 发布时间:2013年07月25日

37.一个句子中的多个动词如果表示同时或几乎同时发生的动作或状态,其时态应保持一致。

Whenever the alarm clock rings in the morning,I yawn,stretch,and roll over for another five minutes of sleep.(一般现在时)

The following Tuesday I raced home from school,put the bag over my shoulder,dumped the magazines in and embarked on the highway of journalism.(过去时)

On the one hand,the government will do what it can to hunt for the hackers(黑客)and ,on the other hand,internet users will have to learn how to protect themselves.(将来时)

38.在并列句中,如两个或两个以上的动词所表示的动作不是同时或几乎同时发生(或不是同时期的状态)动词的时态按照动作发生的具体情况而定。

In the past,most families in China didn’t have a TV set,but now,a lot of them have not only TV sets,but also computers.(一般过去时和一般现在时)

He broke his leg in the accident,and according to the doctors,he will never be able to walk again.(过去时和将来时)

39.在主从复合句中,从句动词的时态取决于主句动词的时态。一般来说,主句动词为现在时,从句动词的时态则根据从句动词和主句动词所表示的动作先后次序来确定。

Many people believe that morning exercises do them a lot of good.

He thinks that it will rain tomorrow.

We know that we have missed an opportunity and that it may never come again.

I am in good shape because I used to do a lot of exercises.

He says that they are working on a new model of Boeing(波音飞机).

当主句动词为现在完成时时,从句动词一般为过去时。

Scientists have studied the universe ever since telescope was invented.40.若主句动词为过去时,从句动词一般为过去时或过去完成时,情态动词也要相应地改成过去时。引导间接引语的动词是过去时态时,也要用时态呼应的规则

Centuries ago,people held a belief that the sun moved around the earth.

He thought that it would rain the next day.

若主句动词为过去完成时,从句动词一般用过去时。

He had done all that was necessary.

By the time they found the hacker,he had already broken into the computer system of the bank.

在使用过去时态呼应规则时,应注意过去时态只与过去的事件有关,与现在的情况无关。

I got the job because I was a good driver.(并不表示我现在就不是好司机)

I wanted to join the police,but I wasn’t tall enough.(不表示我现在就高了)

41.若主句动词是将来时或将来完成时,从句动词一般现在时或现在完成时

I’ll write to you as soon as I finish/have finished the final exams.

The workmen will have completed their repairs by the time the airport is reopened.

 

Unusual Prepositions:

but,except,from,instead of

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