when后面可以加过去进行时吗
可以，当过去进行时与when连用，when后面跟过去进行时或过去时均可，依具体情况而定，前者译为“当……正在……时（从句），……正在……（主句）”，后者译为“当……发生了时（从句，强调动作发生了），……正在……（主句）”。
when前面用将来时或者一般现在，后面用一般现在时，when前用过去进行时，后面用过去时。when的用法四种句型：be doing sth…when；be about to do sth…when；hardly…when；had just done…when。
when的用法四种句型
when的句型
1.be doing sth…when…
例：He was still smiling when the door opened and his wife came in.
他正笑着的时候门突然开了，他妻子走了进来。
2.be about to do sth…when…
例：We were about to start when it began to rain.
我们刚要出发，天就开始下雨了。
3.had not done sth…when…/hardly…when…
例：He had not fallen asleep when the telephone rang.
他刚要入睡电话就响了。
4.had just done…when…
例：I had just gone to bed after a very hard day when the phone rang.在劳累了一天之后我刚刚就寝，电话铃就响了。
when双语例句
Yes,I have one. When you need it?
是的，我有一间。您什么时候要？
But because of who I am when I am with you.
而是因为我喜欢与你在一起时的那个我。
Because of who I am when I am with you.
而是由于我爱好与你在一起时的感觉。
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