请问 He would sit for hours doing nothing.为什么要用doing呢?

请问 He would sit for hours doing nothing.为什么要用doing呢? Often he would sit for hours doing notOften he would for hours doing nothing at all when he was in low spirits,求翻译? He was a rather lazy fellow .He --------in the sun for hours doing nothing.A.was going to sit B.satC.would sit D.was sitting When the old man was alive,he ____ sit for hours at the door.A:would B:cou he would like sit in the sun的同义句 He would rather sit there because of the hot weather(否定句) He would（）（）sit there because of I would sit there for hours,doing nothing at all.I would sit there for hours,doing nothing at all. When the old man was alive,he _ sit for hours at the door.would B.could C.must D.might Often he ________ sit for hours doing nothing at all in front of the computer.A.was used to B.would C.used to D.should He ____(not would) like ____(sit)here,根据提示写单词 What would he like you ()for him? When the old man was alive,he ____ sit for hours at the door.A.would B.could C.must D.might为什么不选B?选哪个,为什么 would it be possible to sit in on a teaching session 请问这句话怎么翻译 will sit for 请问i would be up for he motions for her to sit down,which she does.中which she does 的意思 He will sit for hours reading.reading是动名词还是什么?做什么成分? 请问：I would rather you ____his help tomorrow,for he is goood at maths.A.went for B.would go to C.should go to D.go for四选一，