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释义：
come and go 来来往往
这个短语看似陌生，但其实很有用处。可以用在自由出入或非永久的擦肩而过等情况下。Have come and gone 则是现在完成式的用法。
例句：
This is my home and I want to be able to come and go whenever I want!
这是我家，我想什么时候出入就什么时候出入！
I have stomachaches. They come and go in every few minutes.
我肚子疼，每隔几分钟就会疼一次。
There's no chance my mother's already come and gone.
我妈妈不可能来过又走了。
对话：
A: Has Janet been over to see you today?
加内特今天来看过你吗？
B: No, she comes and goes when she has free time.
没有，她有时间时才会过来。
