几个must be转换的小句子,大家给看看对吗?

Question

He must be here at six o'clock.
He has to be here at six o'clock.

He must be at the office early tomorrow.
He has to be at the office early tomorrow.

He must be sleeping.
I think he is probably sleeping.

He must be in France next week.
He has to be in France next week.
那第一个应怎么改呢?

Answer 1

情态动词 must 有两层含义：
一、相当于汉语的“必须”，表示为道德良心、法律或者习惯所要求或强迫，与 have to 意思相近，它的否定是 may not 或 mustn't。如：
Soldiers must obey orders. 军人必须服从命令。
We must keep our word. 我们必须遵守诺言。
You must not do it. 你不可以做那件事。
We may not tell him. 我们不该告诉他。
* He must be at the office early tomorrow. 大体等于 He has to be at the office early tomorrow.
* He must be in France next week. = He has to be in France next week
二、相当于汉语的“必定”，表示推断或指具有较大的可能性，否定式是 can't。如：
* He must be here at six o'clock. ( 可作如下改动：)
-- I am sure he is to be here at six o'clock.(“be to + 动词”也是一种表示将来的形式 )
-- I suppose he will be here at six o'clock.
-- Perhaps he will be here at six o'clock.
等等。
* He must be sleeping. = I think he is probably sleeping.

带*号的是你提的问题。

Answer 2

1是错的，在1中，must be是推测。
4很难说，要有情景。
must可以表达推测和命令