insist通常用作不及物动词和及物动词，有坚持，坚决要求等含义；作坚决要求、一定要讲时,其宾语从句常用与将来事实相反的虚拟语气。

一.用作不及物动词

I will have another glass if you insist.

你这样坚持,我就再喝一杯。

二.用作及物动词

They insisted that she should be invited.

他们坚持要邀请她。

I insisted that you should be there on time.

我坚持认为你应该准时到那儿。

三.引出直接引语

“Surely he did right,” she insisted.

“肯定他做对了,”她坚持说。

四.insist on (doing) sth. 坚持某种做法、意见、主张。

They insisted on leaving that day. 他们坚持要在那天走。

五.insist作坚决要求、一定要讲时,其宾语从句常用与将来事实相反的虚拟语气,即should+动词原形,其中should可以省略。

Her father insists that she (should) learn music after she leaves school.

她父亲坚持说她放学后应该学音乐。