used to反意疑问句There used to be a lot of trees.变反义疑问句有没有 used not th_英语解答

used to反意疑问句
There used to be a lot of trees.变反义疑问句有没有 used not there的或者是usen’t的?或者did not there?

人气：116 ℃　时间：2020-02-08 11:26:26

解答

反义疑问句,用did引导,did there used to be …!