野生知识点：
* How come?：为什么
* 与Why一样，可以单独使用
A: I quit my job.
B: How come?
A：我辞职了。
B：为什么啊？
* 也可以作为句子的开头，引出后面的问题，此时与why的用法不同，how come 后跟的句子无需倒装。各种情况对比如下：
Why are you studying English?
How come you are studying English?
你为什么在学英语？
Why did you buy that car?
How come you bought that car?
你为什么买了那辆车？
Why didn't you call me this morning?
How come you didn't call me this morning?
你今天上午怎么没给我打电话？
用户评论