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!

⒉ 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。

强调句的疑问句

⒈ 强调结构的疑问形式：强调一般疑问句中的某一成分时，要在主句中用一般疑问句的顺序。

如：Was it you that/who broke the window?

Was it in the war that he lost his son?

⒉ 强调特殊疑问句中的疑问词，其结构模式是："疑问词+is/was+it +that。"它同感叹句的强调模式极其相似，首先将疑问句开头的部分作为强调部分，套入强调结构，然后再将其变为疑问句。

如：Where were you born?

→Where was it that you were born?

What did you want to see?

→What was it that you wanted to see?

How many people are being trained for the special work?

→How many people is it that are being trained for the special work?

强调句型中的主谓一致

⒈ 被强调的成分为原句的主语时，that/who之后的谓语动词应与被强调的名词或代词在人称和数方面保持一致关系，从而选用恰当的动词形式。

如：It is you who/that are wrong.

It is I who/that am answering the question.

⒉ 但是如果被强调的部分是人称代词，按理应用人称代词主格形式，但在口语或非正式文体中也可以用其宾格形式，此时that/who的谓语动词要用单数第三人称形式is或was。

如：It is me who is being asked the favor.

⒊ 另在Itis/was...，not...that...句型中，其谓语动词应与肯定部分的词保持一致关系。

如：It is my brother,not I that studies in that school.

It is you,not your sister that are in charge of the company.

感叹句的强调结构