2023年初中英语语法：用一般过去时代替完成时

用一般过去时代替完成时

1)　两个动作如按顺序发生，又不强调先后，或用then，and，but 等连词时，多用一般过去时。

When she saw the mouse，she screamed.

My aunt gave me a hat and I lost it.

2 ) 两个动作相继发生，可用一般过去时;如第一个动作需要若干时间完成，用过去完成时。

When I heard the news, I was very excited.

3)　叙述历史事实，可不用过去完成时，而只用一般过去时。

Our teacher told us that Columbus discovered America in 1492.

用于现在完成时的句型

1)It is the first / second time…. that…结构中的从句部分，用现在完成时。

It is the first time that I have visited the city.

It was the third time that the boy had been late.

2)This is the… that…结构，that 从句要用现在完成时.

This is the best film that I've (ever) seen.

这是我看过的最好的电影。

This is the first time (that) I've heard him sing.

这是我第一次听他唱歌。

典型例题

(1) ---Do you know our town at all?

---No, this is the first time I ___ here.

A. was　 B. have been　 C. came　 D. am coming

答案B. This is the first time 后面所加从句应为现在完成时，故选B。

(2) ---Have you ____ been to our town before?

---No, it's the first time I ___ here.

A. even, come　 B. even, have come　　C. ever, come　 D. ever, have come

答案 D. ever意为曾经或无论何时，反意词为never，此两词常用于完成时。 This is the largest fish I have ever seen. It is / was the first time +that-clause 的句型中，从句要用完成时。

注意：非延续性动词的否定形式可以与表示延续时间的状语连用。即动作不发生的状态是可以持续的。

(错)I have received his letter for a month.

(对)I haven't received his letter for almost a month.

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