can be也可用于疑问猜测.或者用may ,can‘t be 才是用于否定
例句:
Can it(baby) be a boy or a girl?
May I ...(不过此句型常用于请求,也有猜测意)
He mustn't be here.I saw him aboard yesterday.
It must be it.
He can't be a tough guy.He's too weak.
can be也可用于疑问猜测.或者用may ,can‘t be 才是用于否定
例句:
Can it(baby) be a boy or a girl?
May I ...(不过此句型常用于请求,也有猜测意)
He mustn't be here.I saw him aboard yesterday.
It must be it.
He can't be a tough guy.He's too weak.