強(qiáng)調(diào)句的基本句型是it is/was+被強(qiáng)調(diào)的內(nèi)容+that/who從句。

例：John gave Mary a handbag at christmas根據(jù)上下文和語境，說話人可以通過強(qiáng)調(diào)句型分別強(qiáng)調(diào)主語、賓語、狀語，使之成為信息中心。

如上句可以轉(zhuǎn)化為：

1.It was john that/who gave Mary a handbag at christmas.(強(qiáng)調(diào)主語john)

2.It was Mary that john gave a handbag (to) at christmas.(強(qiáng)調(diào)間接賓語mary)

3.It was a handbag that john gave mary at christmas.(強(qiáng)調(diào)直接賓語 a handbag)

4.It was at christmas that john gave mary a handbag.(強(qiáng)調(diào)狀語at christmas)

1、被強(qiáng)調(diào)的是狀語或狀語從句時，要用that引導(dǎo)句子，而不能用which，而且通常不能省略。

例：It is on the satellites of the mars that scientists have found water.

科學(xué)家是在火星上發(fā)現(xiàn)了水。

2、被強(qiáng)調(diào)的是人時，引導(dǎo)詞可以用who,也可以用that.

例：It was you that/who let out the secret to her.

是你把這個秘密泄露給她的。

注意：當(dāng)被強(qiáng)調(diào)的是主語時，代詞要用主格形式。

3、被強(qiáng)調(diào)的不管是單數(shù)還是復(fù)數(shù)名詞時，主語的be動詞都用單數(shù)is或was。

對not...until時間狀語從句進(jìn)行強(qiáng)調(diào)時，其句型是：“It is/was not until ...that從句，即not和until在強(qiáng)調(diào)句型中不能分開。