应该说Used it to be thought that the earth was flat吧
答案选Used it be thought that the earth was flat觉得不大对劲儿
应该说Used it to be thought that the earth was flat吧
答案:1 悬赏:30 手机版
解决时间 2021-08-13 20:40
- 提问者网友：沦陷
- 2021-08-13 10:00
最佳答案
- 五星知识达人网友：神的生死簿
- 2021-08-13 10:58
it used to do sth表示过去常常做什么
它的疑问和否定都有两种表达
疑问：used it to do./ did it used to
否定：it usedn’t to do/ it didn't used to
你的提问就是陈述句it used to be thought that ther earth was flat.采用了第一种疑问式变成的疑问句.以前人们认为地球是平的吗?
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