they-----[do/doing]their homework 选do还是选doing

What do they doing?是What do they like doing？ What do they like doing? they-----[do/doing]their homework 选do还是选doing they don't doing their homework now. They can't have been doing thier homework.have been 是现在完成时,但是后面do为什么要变成doing?They can't have been doing thier homework.这句话 have been 是现在完成时,但是后面do为什么要变成doing?为什么不用do呢? can't help do 还是doing what do you t-----you are doing they can‘t do hard They Do,They Don'T 歌词 They Do,They Don'T 歌词 many of your classmates dislike having to stay up late doing thei lessons,(don't they)为什么为什么不是do they? 读对话,回答问题Mingming:What do you see?Dingding :I see my classmates.Mingming:What are they doing? Are they picking up leaves?Dingding :No,they aren't.Mingming:Are they catching butterflies?Dingding :No,they are watching what are they doing today 可不可以换成what do they doing today What can't they do　还　 what they cant do? What are they doing?Do you think?（合并） don't need doing还是don't need to do? 英语翻译All succesful people have the habit of doing the things failures don't like to do.They don't like doing them either necessarily.But their disliking is subordinated to the strength of their purpose. They are looking for work and still haven't go anything____A.doing B.done C.to be done D.to do