解放军文职考试：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 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.

　　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。