4. 如果强调已经终止的习惯时要用used to do

He used to drink.他过去喝酒。（意味着他现在不喝酒了。喝酒这个动作终止了）

I used to take a walk in the morning.

我过去是在早晨散步。（意味着现在不在早晨散步了）比较

I took a walk in the morning. 我曾经在早晨散过步（只说明过去这一动作）

　　5. 有些句子，虽然没有表示过去确定时间的状语，但实际上是指过去发生的动作或存在的状态的话，也要用过去时，这一点要特别注意！

　　I didn't know you were in Paris. 我不知道你在巴黎。

　　（因为在说话时，我已经知道你在巴黎了。这句话指的是说话之前，所以只能用过去时表示。实际上，这句话暗指：But now I know you are here.）

　　I thought you were ill. 我以为你病了呢。

　　（这句话应是在说话之前，我以为你病了。但是现在我知道你没病）

【辨别正误】: Li Ming studied English this morning.（变一般疑问句）(B级)

　　（ ）1.Did Li Ming studied English this morning？

　 ______________________________________________

　　（ ） 2. Does Li Ming Study English this morning？

　　 ______________________________________________

　　（ ） 3.Was Li Ming studied English this morning？

　 ______________________________________________

当堂检测 Have a in-class test (知识应用C级)

1. Once you ______ the knack of it, you will have no further difficulty.

A. shall have B. had had C. are having D. have

2. Every time he ______ me, he is rude to me.

A. will see B. sees C. is seeing D. is seen

3. John told Mary that he ______ what he was doing during the vacation.

A. was just asked B. was just asking

C. had just been asked D. had just asked

4. Now that you _______ , what are you going to do?

A. are been returned B. have been returning

C. have been returned D. have returned

5. I started my teaching career at the school. That was more than twenty years ago, and I ______ there ever since.

A. was B. had been C will be D. have been

6. Everything on the earth ______ all the time.

A. is changing B. is changed C. has changed D. has been changed

7. We ______ fine weather for the past few days.