用法点拨
(1)这是一个省略结构。while是一个引导时间状语从句的连词,后面省略了you are。
(2)状语从句的主语和主句的主语是同一个人或物,并且从句中含有 be 动词的某种形式,这时从句中的主语连同这个 be 动词可一起省略,且并不影响句子的意思。这种情况一般出现在由 when, while, before, after, until, unless, if, though/although 等连词引导的从句中。
Don't talk while eating. 吃饭的时候不要说话。
He knows many things though (he is) very young.
他年龄不大,但知道的事不少。
(3)当状语从句为"连词+it is +adj."时,也常将it is 省略掉。
When (it is) possible,I'll go to Beijing to see you.
可能的话,我将去北京看你。
If (it is) necessary,I'll come tomorrow.
必要的话,明天我就来。
完成句子
(1)When_he_was_young(年轻时),he gained many prizes.
(2)I won't go to the party unless_invited(除非被邀请).
(3)When/while_at_school( 上学时), he was not good at languages.
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用法点拨
(1)not...until...直到......才......,直到......为止。其中,until既可作连词,也可作介词。
(2)当not until位于句首时,句子要倒装。其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+其他。
Not until the teacher came in did the students stop talking.
直到老师进来学生们才停止讲话。
(3)not until的强调结构为:It is/was not until+从句/表时间的词+that+其他。将上面两句改为强调句为:
It was not until the teacher came in that the students stopped talking.
翻译句子
直到父亲回来我才看电视。
(1)I_didn't_watch_TV_until_my_father_came_back.
(2)Not_until_my_father_came_back_did_I_watch_TV.
(not until 放在句首)
(3)It_was_not_until_my_father_came_back_that_I_watched_TV.(强调until从句)
考题例证
"You can't have this football back ________ you promise not to kick it at my cat again,"the old man said firmly.(广东高考)
A.because B.since C.when D.until
答案 D
解析 表示直到......才发生的结果。
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