作业帮They sang happily until it got dark.=They didn't -----------
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They sang happily until it got dark.=They didn't ------------until it got dark.
我来给你细细解释这个句子
They sang happily until it got dark.
untill的前半句多用否定句,当用肯定句时,像这句
他们唱的很开心,偏偏天黑了.
天黑前,他们一直很开心的唱,天黑坏了他们的好事.
注意这里不能用till代替until,意思不一样的.
用作否定句时：not...untill...直到...才
They didn't stop singing happily until it got dark.
知道天黑,他们都不停的唱着.
They sang happily until it got dark.
untill的前半句多用否定句,当用肯定句时,像这句
他们唱的很开心,偏偏天黑了.
天黑前,他们一直很开心的唱,天黑坏了他们的好事.
注意这里不能用till代替until,意思不一样的.
用作否定句时：not...untill...直到...才
They didn't stop singing happily until it got dark.
知道天黑,他们都不停的唱着.
They sang happily until it got dark.=They didn't -----------
they didn't leave it was dark
it wans't dark until they _______________ up their tents 用pu
they sang happily .they must ______ the examination
It was ___(nearly)dark when they got there.
They sang and danced happily and really e____ themselves.填空!
They didn’t start until the rain stopped.
nobody knew it ,didn't they.改错
They didn't tell me whether she had got well
She didn't stop working until it was dark.（保持原句意思不变）
I know they didn't go home until they finished that task.语法正
【单项选择】They got the first prize and all of them（）it happily.A