Question

I told Sally how to get there, but perhaps I ________ for her.

A．had to write it out

B．must have written it out

C．should have written it out

D．need to have written it out

Answer 1

C

試題分析：考查情態(tài)動詞+完成式的用法：句意：我告訴Sally怎么到這兒，但是可能我應(yīng)該把它寫下來。本應(yīng)該做而沒做should have done，must have done過去一定做了，need 后面直接接have done，沒有to，選C。
點(diǎn)評：情態(tài)動詞無論是表達(dá)“推測和可能性”，還是表達(dá)“虛擬”這一概念，只要是對過去已經(jīng)發(fā)生的事情進(jìn)行描述，一律用“情態(tài)動詞+have done”這一結(jié)構(gòu)；對現(xiàn)在或?qū)�來的事情進(jìn)行描述，用“情態(tài)動詞+動詞或系動詞原形”。