动词的时态

备考要点：英语中常用的时态有12种。在英语（一）考试的词形填空题中，经常被测试的动词时态有：一般现在时、一般过去时、一般将来时、现在进行时、现在完成时、过去完成时，且题目中一般都有明显的时间暗示。

特别提示：

1）特殊记忆一些不规则动词的过去式和过去分词。

2）特殊记忆一些暗示一般现在时、一般过去时、现在完成时和过去完成时等时态的时间状语。具体如下：

1.一般现在时

1) 一般现在时常与often, always, usually, sometimes, everyday, once a week等时间状语连用。

2) 一般现在时表示客观事实或普遍真理。

3）第三人称单数作主语时，动词后要加-s

标志词：often, always, usually, every day, once a week              

He takes a walk after supper every day.

How often do you wash your hair?

Sometimes information in the long-term memory is___ (be) hard to remember．(4B 2000 上 )

2.一般过去时

标志词：yesterday, last week, three years ago, in 1987

He lived in London when he was young.

In the l600’s，travelers from Europe_brought__ (bring) back diamonds from India．(6A 2000 上 )

3.一般将来时

Will (shall) + 动词原形

Am (is, are) going to +动词原形

Am (is, are) about to +动词原形

Am (is, are) to +动词原形

We’ll have to be careful in doing business with them.

4.现在进行时

Am (is, are)  + doing

What are you doing?

I’m doing some washing.

5.现在完成时

1)现在完成时不能使用明确表示过去时间的状语，例如：yesterday, last week, in 1993等。

2)现在完成时可以和already, never, ever, not…yet等副词连用。@

3)现在完成时常和since引导的短语或从句，或由for引导的表一段时间的短语连用。

Have (has) + 过去分词

I haven’t seen her since 1991.