有没有keep on to do 和keep to do的说法?急啊!5分钟求解!

有没有keep on to do 和keep to do的说法?急啊!5分钟求解! 有没有keep on to do sth.的说法? 保持做某事 只有keep on doing sth.有没有keep doing sth.或keep to do sth. 有keep to do和keep sb. to do吗? 有没有keep to do这个短语 keep on to do对吗, keep的用法 短语结构 和 例句keep on 加什么（doing to do do) keep和keep on的差别contineue go on keep up的区别是+doing还是to do？ insist on ,stick to (doing),keep at,keep doing sth,keep on doing keep to do sth.go on doing goinsist on ,stick to (doing),keep at,keep doing sth,keep on doing,keep to do sth.go on doing,go on to do,go on with ,有什么区别 有没有keep to do sth.这个固定搭配. keep有没有keep do的用法. 有没有keep do 或keep to do这两个词组 那么关于keep有哪些词组 keep有keep doing sth.keep do sth .keep to do sth .请把用法和例句留下 How to learn English in the university?I find it is really a problem,for I can hardly to keep my heart on it.Could you tell me how to do.有没有“可行”的计划？特别是口语和听力 rely on sth to do 和rely on sth doing 的区别有没有区别 语法：有没有keep sb do/to do sth?如果有, keep 用法一般是 keep sb doing sth到底有没有keep sb to do sth?我看有的人说有,有的人说没有,到底有没有啊 keep sb doing sth 和keep sb to do sth 有什么区别啊