【英语问题】“Must be”“Can't be”“May be”的区别(请详细一点,

问题描述:

【英语问题】“Must be”“Can't be”“May be”的区别(请详细一点,

must be 一定 can't be 不能 may be 可能

must be 肯定猜测" 一定是‘
can't be 否定猜测“ 不可能是”
may be 可能是( 不是很肯定)

Whose book is this I am not sure,it may be Jim's .
Whose book is this It must be John's .Look ,his name is on it .
The man can't be Mr.Green because he has gone to Beijing .