can/may/must表推测的用法
can, may, must等都可用于表推测，但它们的含义和用法不同。
must语气最肯定，指“一定、必定”，只用于肯定句中。“must+动词原形”表示对现在情况的推测；“must + have + done ”表示对过去情况的推测。如：
Mum must be cooking supper now.妈妈现在一定在做晚饭。
He must have finished his work.他一定完成他的工作了。
May/might表示“或许，可能”。如：
Tom may go abroad next year.汤姆明年可能要出国。
She might have finished the work.她可能已完成这项工作了。
He can’t know the answer.他不可能知道这个答案。
can/could表示“可能，会”，我用于否定和疑问句中。如：
Could she he at home?她可能在家吗？

can,表示一时的情况，意为“有时侯会……”。

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can的这种用法，只用在肯定句中。如：
Children are lovely, but they can be tiring.
 Training by yourself in a game can be highly dangerous.

carry短语归纳
carry away拿走，带走；carry on(with)one’s work继续工作；carry on a struggle/fight 开展斗争；carry on a big business经营大生意；carry out a plan/order/promise/instructions/one’s duty/an experiment/advices/tests执行计划/执行命令/履行诺言/执行指示/履行职责/做实验/按建议办/进行试验；be carried up into space被发射升空。
[应用]介、副词填空
①It’s often easier to make plans than it is to carry them______.
②Let’s stop here. We’ll carry________ the conversation tomorrow.
③Carry the baby _______. It’s dangerous here.
④Rising costs made it hard to carry ________ the business.
⑤They decided to carry ________ though the weather was bad.
Key:①out ②on ③away ④on ⑤on

carry out 搬出；进行，实行，执行
    ①Would you please carry the chairs out?
The plan should be carried out at once.
  It was important to carry out the work quickly.赶快进行这些工作是重要的。
  He did not carry out his promise to us.  对我们他没有实现他的诺言。
  用out构成的短语：look out向外看，小心work out算出来，实行。
  leave out遗漏，忽视  take/bring out拿出来
thinking out想出  hold out伸出，支持，抵抗到底

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