3. 情态
用法：
1. 情态动词 + 动词原型 2. 情态动词的人称变化无 3. 情态动词的动态变化有限 4. 情态动词变否定/疑问四六级常用的情态动词有：
| 现在时 | 过去时 |
|---|---|
| must | 无 |
| can | could |
| will | would |
| shall | should |
| may | might |
| 1 情态动词表示情态 |
|---|
-
Air pollution must be taken seriously.
-
The government can solve the problem of water pollution.
-
Tony could walk when he was only one year old.
-
Will you marry me?
-
I will travel abroad with my family.
-
Potential buyers would cheer for lower interest rates.
-
To some extent.expressions may influence emotions.
-
Such bodily reaction might help moderate the work stress.
-
Students should work hard to pass the exams.
-
Those sick people should seek help from doctors.
| 2 情态动词表示推测 |
|---|
-
The details may be unknowable.
-
Such searches must take years.
-
The loss of patience can potentially have a damaging impact on our professional and personal wellbeing.
-
The way of saying those things may have led to misunderstanding.
-
Now something similar could be happening in the South Africa.
练习：
- In order to be a good salesclerk, you (must not/will not) be rude to a customer.
- This pie is very good. You (should/must)try a piece.
- Rice (should/must/may) have water in order to grow.
- Don't be nervous. I think you (can/must) make it.
- I am not sure. Probably he (may/should) come later.