第一句：We had to wait until he came back.

第一句：We had to wait until he came back.
第二句：I won't go until he comes back
为什么第一句came不加S,而二句come加S不是Until引导时间状语从句吗,既然是引导时间状语从句为什么第一句不用一般现在时代替一般将来时呢?
在什么情况下Until引导时间状语从句
还有什么是持续性动词什么是瞬间性动词
请各位高手帮我好好讲讲.

绿茶- 1年前已收到2个回答举报

NJtiger 幼苗

共回答了15个问题采纳率：86.7% 举报

came是come的过去式所以不加S,在状语从句中前后时态要相互应.持续性动词表示可持续的动作瞬间性动词表示短时间内完成的动作

1年前

调到三亚很gg 幼苗

共回答了9个问题举报

came是过去式,所以不加S 第二句要前后时态一致(第一句当然也要时态一致),但come是瞬间性动词,可以又一般现在时表将来

1年前

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