千年zz僧挥精如土
春芽
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until 的否定和肯定句意义如下:
用在肯定句里,表示主句动作一直持续,直到从句动作发生为止.如:
I waited for five hours until it was dark.我等了5个小时,一直等到天黑.(天黑后,我就走了)
用在否定句中,表示从句动作发生后,主句动作才发生.如:
I didn't finish my homework until my mother came back.直到我妈回来我才完成功课.
根据第二条规则,用not...until没办法表述“直到我的妈妈回来我都没有完成我的家庭作业”
你可以尝试用其他结构:
I didn't finish my homework when my mother came back.
1年前
6