(二)not until 句型的强调句
1、句型为:It is/ was not until + 被强调部分 + that + 其它部分
e.g. 普通句:He didnt 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.
2、注意: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。
(三)谓语动词的强调
1、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。
e.g. Do sit down. 务必请坐。
He did write to you last week. 上周他确实给你写了信。
Do be careful when you cross the street. 过马路时,务必(千万)要小心啊!
2、注意:此种强调只用do/ does和did ,没有别的形式;过去时用did ,后面的谓语动词用原形。
二、It的用法
(一)作人称代词
1、it代替前面(或后面)的单数名词或分句等所表示的事物。
e.g. You cannot eat your cake but have it.(it代替前面的cake)
Although we cannot see it, there is air all around us. (it代替后面的air)
【语法复习五:强调句、It的用法、省略和插入语】相关文章:
★ 高考英语语法复习及配套练习五:强调句、It的用法、省略和插入语
★ 介词用法大全
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2016-02-29
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