notuntill的时态
not untill的时态
参考答案
not ...until 引导时间状语从句,从句不能用将来时,主句是一般将来时,从句用现在时.Don't get off the bus until it stops.(主句是祈使句从句用现在时)He didn't go to bed until his mother came back.(主句是过去...
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