4.not until 句型的强调句
A. 句型为:It is/ was not until + 被强调部分 + that + 其他部分
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.
B. 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。
5.谓语动词的强调
A. 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。
Do be careful when you cross the street. 过马路时,务必(千万)要小心啊!
B. 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。
三、强调形式
常见到的强调形式,共有以下七类:
⒈用dodoesdid + V可表强调
Some people do believe that nuclear power poses a threat to the world peace.
⒉adv或adj可表强调:Never only Very
This is the very question that deserves careful analysis.
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