keep to do 和keep doing有什么区别,分别怎么用?

有keep to do和keep sb. to do吗? keep doing 和keep to do的区别 keep有keep doing sth.keep do sth .keep to do sth .请把用法和例句留下 Keep+to do sth keep to do和keep up 和keep doing的区别 keep的用法 短语结构 和 例句keep on 加什么（doing to do do) keep sb to do sth could not keep to do keep on to do对吗, keep和keep on的差别contineue go on keep up的区别是+doing还是to do？ keep doing和keep sth doI was so tired that i couldn't keep my eyes ______.A.opening B.open C.opened D.to open.为何选B而不是选A? keep sb doing sth 和keep sb to do sth 有什么区别啊 keep doing 和keep to do 区别是什么,它们的意思是什么 英语中keep to do和keep doing有什么区别 keep to do 和keep doing有什么区别,分别怎么用? Keep Do keep to do sth keep doing sth的区别 What do you do to keep healthy?