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句型 — not ...until...句型
作者:frog  文章来源:本站原创  点击数  更新时间:2010-3-30 16:21:02  文章录入:frog  责任编辑:frog

    句型中的until既可作介词也可作连词,在肯定句中意思为“到……为止”。在否定句中意思为“直到……才”,表示谓语所表示的动作或状态一直到until所指的时间才结束。例如:[文章来自:考试与评价 http://www.trgroup.com.cn/te/ M8@@`6N :"#*L;]
    Her mother didn't leave until she was asleep.直到她睡着了,她母亲才离开。[文章来自:考试与评价 http://www.trgroup.com.cn/te/ GeZ)P43aaxk*]
    (1)在短语或从句里用了until之后,如果主句中的谓语动词是非延续性动词,要用否定形式,即用“not…until”形式。例如:[文章来自:考试与评价 http://www.trgroup.com.cn/te/ F!4[N.6y8ekY]
    We will not begin the meeting until you come back.你回来后,我们再开会。[文章来自:考试与评价 http://www.trgroup.com.cn/te/ {2.-P"7.�2*qJ/Dn]
    (2)若主句里的谓语动词是延续性动词,其动词用肯定式或否定式都可以,但意思不同。例如:They had the meeting until I came back.这个会他们一直开到我回来。[文章来自:考试与评价 http://www.trgroup.com.cn/te/ O=Y JB2KiKepT/H]
    They didn't have the meeting until I came back.直到我回来,他们才开会。[文章来自:考试与评价 http://www.trgroup.com.cn/te/ XOsXD, ;`{hcD_]
    (3)主句若用一般将来时,until从句要用一般现在时,表示将来的动作。例如:[文章来自:考试与评价 http://www.trgroup.com.cn/te/ &{)!-E|0\hn|+n( n]
    The students will not leave the classroom until their teacher comes.直到老师来,学生才能离开教室。
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