<font face = "微软雅黑" > <h2 style = "color:red">3. 情态</h2> <h3>用法：</h3> 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
<h3>四六级常用的情态动词有：</h3> <table style = "width:400px;height:200px;border-spacing:1px;"> <thead> <tr style = "background-color:#23238E;color:#D9D919"> <th>现在时 <th>过去时 </tr> </thead> <tbody> <tr> <td align = "center">must <td align = "center">无 </tr> <tr> <td align = "center">can <td align = "center">could </tr> <tr> <td align = "center">will <td align = "center">would </tr> <tr> <td align = "center">shall <td align = "center">should </tr> <tr> <td align = "center">may <td align = "center">might </tr> </tbody> </table> must “必须”  can/could“能够，可以” will/would“愿意/将要” may/might“可以，可能” should“应该” <table > <tr style = "background:silver"> <th>1 情态动词表示情态 </tr> </table> * We <ins>must finish</ins> the work within a week.
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Air pollution <ins>must be taken</ins> seriously.
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The government <ins>can solve</ins> the problem of water pollution.
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Tony <ins>could walk</ins> when he was only one year old.
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Will you <ins>marry</ins> me?
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I <ins>will travel</ins> abroad with my family.
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Potential buyers <ins>would cheer</ins> for lower interest rates.
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To some extent.expressions <ins>may influence</ins> emotions.
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Such bodily reaction <ins>might help</ins> moderate the work stress.
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Students <ins>should work</ins> hard to pass the exams.
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Those sick people <ins>should seek</ins> help from doctors.
<table > <tr style = "background:silver"> <th>2 情态动词表示推测 </tr> </table>
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The details <ins>may be</ins> unknowable.
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Such searches <ins>must take</ins> years.
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The loss of patience <ins>can</ins> potentially <ins>have</ins> a damaging impact on our professional and personal wellbeing.
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The way of saying those things <ins>may have led</ins> to misunderstanding.
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Now something similar <ins>could be happening</ins> in the South Africa.<br><br>
练习：
- In order to be a good salesclerk, you <input type = "text">(must not/will not) be rude to a customer.
- This pie is very good. You <input type = "text">(should/must)try a piece.
- Rice <input type = "text">(should/must/may) have water in order to grow.
- Don't be nervous. I think you <input type = "text">(can/must) make it.
- I am not sure. Probably he <input type = "text">(may/should) come later.
<details> <summary>第一题</summary> <span>1.must not</span> </details> <details> <summary>第二题</summary> <span>2.should</span> </details> <details> <summary>第三题</summary> <span>3.must/should</span> </details> <details> <summary>第四题</summary> <span>4.can</span> </details> <details> <summary>第五题</summary> <span>5.may</span> </details> </font>
来源：oschina
链接：https://my.oschina.net/u/4416684/blog/3973936