Modals – deduction (present) 情態動詞—推論（現在時）
We use modal verbs to say how sure we are about something.
我們用情態動詞去講我們對一個事情有多確定。
1 must 1 必須，一定
We use must when we feel sure that something is true because there’s very strong evidence.
當有強有力的證據的時候，我們用must去表示我們覺得某件事是真的。
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是跟着一個不帶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.
當我們覺得某事可能是真的，但是我們還不確定的時候，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’.
這三個詞同樣跟着一個不帶to的不定式
3 can’t 3 不可能
We use can’t when we feel sure something is not true.
當我們確信某事不是真的的時候，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 跟上面提過的情態動詞一樣，也是跟着一個不帶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，所有這些情態動詞都有其他用法，在另外一節介紹裏會提到。
