④在强调not … until 结构中由 until 短语(或从句)表示的时间状语时,要用固定的强调句型It is(was) not until ...that...。that 从句中的谓语动词用肯定式。My father didn't come home until 12 o'clock last night.
It was not until 12 o'clock last night that my father came home.
⑤在强调一般疑问句中的某一成分时,主句要用一般疑问句的语序把is/ was提到it前面。Did this happen in Beijing?
Was it in Beijing that this happened?
⑥特殊疑问句中只有疑问词可以强调,其强调结构是“被强调部分(通常是疑问代词或疑问副词)+ is/was + it + that/ who + 其它部分?"Where were you born?
Where was it that you were born?
⑦not …until…句型的强调句
句型为:It is/ was not until + 被强调部分 + that + 其它部分
:He didn’t go to bed until/ till his wife came back.
强调句:It was not until his wife came back that he went to bed.
此句型只用until,不用till。但如果不是强调句型,till, until可通用;因为句型中It is/ was not … 已经是否定句了,that后面的从句要用肯定句,切勿再用否定句了。 谓语动词的强调It is/ was … that …结构不能强调谓语,如果需要强调谓语时,用助动词do/ does或did。Do sit down. 务必请坐。
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