Unit 2 What is happiness to you?

Grammar and usage学案

第一部分：重点讲解

过去时态

　　谈论过去的状况或动作一般用过去时态。过去时态包括一般过去时、过去将来时、过去进行时和过去完成时等。

1． 一般过去时

1)表示过去的事情、动作或状态，常与表示过去的具体的时间状语连用，如yesterday, last night, a moment ago, the next day等。

Sang Lan was born in Ningbo, China in 1981.

I attended a meeting yesterday.

Where did he go a moment ago?

2)表示过去经常性、习惯性的动作。

I went to school by bus.

He was often late for school.

3)常用一般过去时的句型。

Why didn't you/I think of that?

I didn't notice it.

I forgot to tell you I had been there with my brother before.

I didn't recognize him.

2. 一般过去时和现在完成比较

　　一般过去时和现在完成时均表示发生在过去的动作,但前者侧重过去的事实,后者侧重过去的动作对现在的影响.

-- My computer ________ wrong although I used it only once.

-- you'd better go to check it.

试比较:

I can't enter the room now because I ____________ (lose) my key.

I can't find my text book now, but I _______ (put) it here.

3．过去进行时