简单句的核心变化(情态)

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
cancould
willwould
shallshould
maymight

must “必须”  can/could“能够,可以” will/would“愿意/将要”
may/might“可以,可能” should“应该”

1 情态动词表示情态

  • We must finish the work within a week.

  • 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:

  1. In order to be a good salesclerk, you (must not/will not) be rude to a customer.
  2. This pie is very good. You (should/must)try a piece.
  3. Rice (should/must/may) have water in order to grow.
  4. Don’t be nervous. I think you (can/must) make it.
  5. I am not sure. Probably he (may/should) come later.

第一题
1.must not


第二题
2.should


第三题
3.must/should


第四题
4.can


第五题
5.may
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