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。
