英语中keep to do和keep doing有什么区别

英语中keep to do和keep doing有什么区别 有keep to do和keep sb. to do吗? keep doing 和keep to do的区别 英语,keep doing sth ,还是keep to do sth ,或者kee英语,keep doing sth ,还是keep to do sth ,或者keep do sth 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 英语快速应答What do you do to keep fit? Keep try和Keep trying的区别?在英语中:Keep try和Keep trying 有什么区别? 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, 英语选择题（写理由）---We should do something _______ our environment ______.A.keeping,cleaned B.to keep,being cleaned C.to keep clean D.keeping,cleaned keep和keep on的差别contineue go on keep up的区别是+doing还是to do？ 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 keep to do 和keep doing有什么区别,分别怎么用?