doing共35篇 after doing还是doafter为介词，介词后接doing,做宾语，介词后面如果用动词，只能用... help to do还是help doinghelp to do还是help doing,都可以。两者都是动词的名词形式。to ... make用法do与doing区别make 后面可以+动词原形，但是不能与doing连用。make sb. do sth... keep on doing sth和keep doing sth的区别短语 keep doing 与 keep on doing 都表示“坚持做，持续做”的意... mean to do和doing的区别 mean有哪些用法mean to do和doing的区别：mean to do sth.打算做某事。mean doi... 上一页 下一页
