作业帮麻烦讲下里面包含的重点,
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/06 00:07:06
麻烦讲下里面包含的重点,
Linda was ______the experiment a month ago ,but she changeed her mind at the last minute.
A.to start B.to have started C.to be starting D.to have been starting
我主要想问下be to句式的要点,
Linda was ______the experiment a month ago ,but she changeed her mind at the last minute.
A.to start B.to have started C.to be starting D.to have been starting
我主要想问下be to句式的要点,
选B.用were/was to have done代替should/could have done,表达虚拟语气.【琳达本该一个月以前就开始了实验,但她最后一分钟改主意了.（也就是没做实验,所以要虚拟）】