英语语法Iknowhimagoodfootballpalyerwhileincollege.A,tohavebeenB,tobeCwasD,hadbeen1,怎么翻译?2,为什么要用A不定式的完成式，完成式与句中谓语该有先后顺序的啊。

Question

英语语法
I know him_____ a good football palyer while in college.
A,to have been B,to be C was D,had been
1,怎么翻译?
2,
为什么要用A 不定式的完成式，
完成式与句中谓语该有先后顺序的啊。

Answer 1

I know him_____ a good football palyer while in college.A, to have been B, to be C was D, had been1,怎么翻译?2,求解析本题问题补充： 为什么要用A 不定式的完成式,完成式与句中谓语该有先后顺序的啊....