一、what about与how about

用这两个短语放在句首的简略问句，都可以用来表示征求意见或询问情况。两者可以互换，但有时不能，what about也有别的用法和解释。例如：

What about going to Harbin tomorrow?

=How about going to Harbin tomorrow?

What about the funding? Where are we going to get it?

=How about the funding? Where are we going to get it?

注意what about有别的用法和解释。例如：

What about it? =What shall we do?

What about the others(Concerning the others, what is your plan or idea?

别的人怎么办？（至于别人，你有什么打算或意见？）

What about it? (Tell me more precisely what you mean.)

这是怎么回事？（把你的意思明确的地告诉我。）

二、what if, what of和what for

这三个短语的用法和含义各不相同。What if表示“倘若……将会怎样？即使……又有什么关系呢？”；what of 表示“……的情况怎样？……又有什么重要性呢？；what for为何目的？为什么？。例如：

What if it rains while we are out?

倘若我们外出遇上下雨，那怎么办呢？

What of it?那有什么了不起呢？（那又怎么样呢？）

Well, and what of it? (It has no importance.)

嗯，那又怎么样呢？（怎么，那有什么了不起？）

What for did you ask that silly question? Now he’s going to speak for another ten minutes. 你干吗要问那个愚蠢的问题？这一来他又得说上十分钟。

What did you do that for?

三、what作the thing that 或as much…as解。

What作关系代词，其作用相当于the thing或people that，请比较：

This is just what I have been looking forward to.

=This is just the book that I have been looking forward to.

The thing that I like most in her is her kindness.

=What I like most in her is her kindness.

The upstart is not what he was ten years ago.

=The upstart is not the man that was ten years ago.

这个暴发户已经不是十年前那个人了。

四、What作关系形容词，其作用相当于as much…as, whatever。请比较：

She will give the sick baby what care she can.

=She will give the sick baby as much care as she can.

Lend me what money you have on hand.

五、What …is或What…are

当what引导的从句作主语时，谓语动词要根据表语的内容判断。请比较：

What I need most are two books.

What I need most is only one book.

六、what is＋形容词或副词比较级

常用的短语有：what is more而且；what is/was worse 更糟糕的是；what is better

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