i can't go to the film with you because this work ()at once.为什么填m_英语解答

i can't go to the film with you because this work ()at once.
为什么填must be done,不是有主语i的吗?
how long will it take you ()the repairs?（complete）这句话什么意思？

人气：328 ℃　时间：2020-03-22 14:02:33

解答

这时候must be done 的主语不为 I 了,真正的主语为this work.
because 引导了一个从句,从句中的动词已不由 I 束缚了.