一、常考的強調(diào)句結(jié)構(gòu)是 it 引導的句子。
    It is (was) 被強調(diào)部分+ that (who) + 句子其他部分。
    此結(jié)構(gòu)強調(diào)的成分僅限于主語，賓語和狀語。例如：
    It was because of the heavy rain that he came late.
    It was yesterday that Tom passed in the maths exam.
    It was not until I had read your letter that I understood the matter.
    原句：My father did the experiment in the lab yesterday evening.
    強調(diào)主語：It was my father who did the experiment in the lab yesterday evening.
    強調(diào)賓語：It was the experiment that my father did in the lab yesterday evening.
    強調(diào)時間：It was yesterday evening that my father did the experiment in the lab. (注意不用when)
    強調(diào)地點：It was in the lab that my father did the experiment yesterday evening.
    二、強調(diào)句還有一種類型，就是用助動詞do (did，does) 強調(diào)謂語。
    She does like this horse. 她的確喜歡這匹馬。
    Please do take care of yourself. 千萬保重。
    三、注意事項：
    1.被強調(diào)成分是主語，who/that之后的謂語動詞應(yīng)該在人稱和數(shù)上與原句中的主語保持一致。
    e.g. It is I who am right.
    e.g. It is he who is wrong.
    2.如果被強調(diào)的成分有同位語，同位語也應(yīng)提前。
    It was from him，his chemistry teacher，that Paul learned to watch carefully in class.
    3. 被強調(diào)成分是作主語的代詞，用主格，是作賓語的代詞，用賓格
    It was he that helped me yesterday. It was me that he helped yesterday.
    4. 被強調(diào)部分既包括人又包括物，用that不用who
    lt was the things and people that they remembered that they were talking about.
    5. 區(qū)分定語從句和強調(diào)句型某些定語從句和強調(diào)句型形式差不多，容易混淆。如果去掉it is/was ...that句子仍然通順成立，則為強調(diào)句型，不成立不通順，則為定語從句。
    e.g. It was three years ago that he went to American for a further study去掉It was that句子為Three years ago he went to America for a further