until前的动词要使用什么形式

1、 until用在肯定句，谓语动词通常是延续性动词，如stand， stay， talk， wait等，表示主句动作终止的时间。

如:

③I waited until he came back.我一直等到他回来。

④The war lasted until 1945.战争持续到1945年。

如果用在否定句，谓语动词通常是瞬间性动词，如open， start， leave， arrive， finish， stop等，强调主句动作开始的时间。如:

⑤I didnt leave the boy until his mother turned up.直到这孩子的母亲来，我才离开。

⑥The noise of the street didnt stop until it was midnight.街上的噪音直到半夜才停止

2、连词until引导的从句中谓语动词的时态

1)until后面的从句中不能用一般将来时，应该用一般现在时代替。所谓的“主将从现”。

He will stay here until his mother comes back.

They will study at the school until their parents come to take them home