insist to do ,insist doing 和insist on doing的意思和用法最好能举例子
3个回答

三个中只有 insist on doing 是对的.

insist on doing sth,= 坚持做某事

例句:

The old man insisted on completing the marathon,even though he was exhausted.

老人坚持完成马拉松,即使他已经精疲力竭了.