when加分詞的用法

1、When+現在分詞.

例如:

When sleeping，I never hear a thing.睡覺時，我什麼都聽不見.

2、When+過去分詞.例如:

This dictionary will look nice when printed.這本詞典印出來時會很好看.

3、When+名詞或形容詞.

例如:

When a boy，he was sick all the time.小的時候，他經常生病.

“when+過去分詞”中的過去分詞通常應視為被動語態的省略，而不能視為完成時態的省略。

如：

When (it is) heated， ice will be changed into water. 當冰受熱時，它就會變成水。

Metal expand when (it is) heated and contract when (it is) cooled. 金屬熱則膨脹冷則收縮。

It will seem as nothing when (it is) compared with his action. 和他的行為相比，這似乎是微不足道的。

The author was able to give his book a plug when (he was) interviewed on a talk show. 作者在接受訪談時可以給自己的書做一番廣告。

When (you are) asked for your views about your current job， on no account must you be negative. 當你被問及對目前工作的看法時，絕不要流露出消極情緒。