必修1《Grammar Summary》集体备课教案设计

必修1《Grammar Summary》集体备课教案优质课下载

The use of the modal verbs may cause some confusion

Some students may have some problems with the distinction between can and may.

Teaching steps:

Step 1 Introduction

情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语．

1. must

1) 表示义务或强烈的劝告，意为“必须”“应该”其否定式表示“不应该”“不许可” “不准”“禁止”。

e.g. 1) You must finish your homework first.

2) Children mustn’t speak like that to their parents.

2) 回答 must 所在的一般疑问句时，否定回答用 “needn’t” “don’t have to”.

e.g. Must we finish the work tomorrow?

No, you needn’t/ don’t have to, but you must finish it in three days.

3) 表示“非要，偏要，”表达说话者的不满，

e.g. Why must you be talking so loudly when others are sleeping?

4) 表示对具体事情的推测，意思是“一定，肯定”语气较强，只用于肯定句中。

e.g. He must come from American.

He must be sleeping at the moment.

He must have stayed up last night.

注意：must 和 have?to

1.must用于一般问句中,肯定回答用must否定式用?needn’t或don’t have to，做?“不必”,mustn’t表示“禁止，不允许”

? e.g.— Must?I?finish?all?assignments?at?a?time? ??—Yes, you must. No,?you?needn't.

2.表示“必须”这个意思时，must?和have?to?稍有区别。must着重说明主观看法，have?to?强调客观需要。另外，have?to?能用于更多时态。

e.g. I don’t like this TV set. We must buy a new one.

There was no more bus. They had to walk home.

2.Can 和be able to