be done是什么時(shí)態(tài)的被動語態(tài)

　　Nothing could be done without her say-so.

　　未經(jīng)她準(zhǔn)許，什么都不可以做。

　　She insisted that everything be done over.

　　她堅(jiān)持全部返工。

　　Everything could be done by a nod and a wink.

　　每件事只靠點(diǎn)撥一下就能辦妥了。