how if,as if,what if,seem like区别举例具体说明

题目

how if,as if,what if,seem like区别举例具体说明

答案

1、how if .
how是特殊疑问词,if表示如果.连在一起表示“如果...会怎么样”.
比如：How if I were a little happy child.
这个短语不经常用,中间要加一些词句.如:How to know if she is interested in you?
2、what if:
一般指如果这件事（或者人、物）发生了,该怎么办.（后面通常加一句话）
例如：what if I die 如果我死了怎么办?
3、as if.
似乎,好像.在look,seem 等系动词后引导表语从句.
　　如：She looks as if she were ten years younger．她看起来好像年轻了十岁.
4、 seem like看起来像 因为like是介词,所以后面跟名词或是动词的ing形式.
如：Those cards seemed like so many little flags dotted about the schoolroom.那些卡片好像许多面小旗点缀着教室.