请问must 有哪几种用法?

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请问must 有哪几种用法?

must1
助词 v.aux.
1.
(表示必要、命令或强制)必须,得
You mustn't talk like that.
你可不能这样说话.
You must do as you are told.
你必须遵嘱行事.
We must be home by six.
我们必须在六点以前回家.
2

1.aux.
I must go there tomorrow.
You must be Tom.
2.n.
Eating vegetables everyday is a must.
Going to school is a must.
3.That dress is a must have.

1:must I ...?
2:must to do ...
3:表示必须 must主观 have to客观
4:引出的问句,否定用needn't或don't have to
5:“must be + 表语”表示推测,它的否定或疑问式用can代替must。
6:“must + have + 过去分词”