we can't get on the bus __it stops.答案是until/before可否用unless 原因
问题描述：
we can't get on the bus __it stops.答案是until/before可否用unless 原因
答
应该用until :not...until 是固定搭配,表示在..之前不能做...we can not get on the bus until it stops.我们在车停下来前上不去.before 在句中通常翻译做“然后”we can not get on the bus before it stops.我们不...