We use modal verbs to say how sure we are about something.
我們用情態(tài)動(dòng)詞去講我們對(duì)一個(gè)事情有多確定。

1 must
1 必須，一定

We use?must?when we feel sure that something is true because there’s very strong evidence.
當(dāng)有強(qiáng)有力的證據(jù)的時(shí)候，我們用must去表示我們覺(jué)得某件事是真的。

  • He must live near here because he comes to work on foot.?
  • We don’t know where he lives but we’re sure it’s not far away.Come inside and get warm – you must be freezing out there.
  • You’re a zookeeper? That must be very interesting.

Notice that?must?is followed by an infinitive without ‘to’.
注意must是跟著一個(gè)不帶to的不定式的。

2 might, may, could
2 可能

We use?might,?may?or?could?to say that we think something is possible but we’re not sure.
當(dāng)我們覺(jué)得某事可能是真的，但是我們還不確定的時(shí)候，我們用might、may和could。

  • Did you hear that? I think there might be a burglar downstairs.?She’s not sure there’s a burglar but she thinks it’s possible.
  • We’ll try to get there early but we may arrive late if there’s a lot of traffic.
  • Don’t put it up there. It could fall off and hit someone.

Might,?may?and?could?are also followed by an infinitive without ‘to’.
這三個(gè)詞同樣跟著一個(gè)不帶to的不定式

3 can’t
3 不可能

We use?can’t?when we feel sure something is not true.
當(dāng)我們確信某事不是真的的時(shí)候，我們用can’t。

  • It can’t be a burglar. All the doors and windows are locked.?He doesn’t know it’s not a burglar but he feels sure it’s not.
  • It can’t be far away now. We’ve been driving for hours. Where’s the map?
  • Really? He has to work on Christmas Day? He can’t feel very happy about that.

Like the other verbs,?can’t?is followed by an infinitive without ‘to’.
Can’t 跟上面提過(guò)的情態(tài)動(dòng)詞一樣，也是跟著一個(gè)不帶to的不定式。
Remember that all of these modal verbs–?must,?might,?may,?could?and?can’t?have other uses. These are covered in another section.
記住，所有這些情態(tài)動(dòng)詞都有其他用法，在另外一節(jié)介紹里會(huì)提到。