什么动词语态中有“be doing”这个句式?怎样判断这个语态?
1个回答

过去完成时:sb have/has done sth

过去进行时:sb was/were doing sth

be doing 在过去进行时,现在进行时,将来进行时,一般将来时里...都有

过去:He was watching TV when the murder happened.

现在:-What are you doing now?

-I am cooking.

将来进行:The young men will be waiting for their favourate singer tomorrow.

一般将来:He's going to invite his classmates.

.还有很多.要区分主要看BE动词.(如过去时为was/were)

但是像go,come等一些特殊进行时表示将来就需要去背了.