關于英語語法

　　強調(diào)句結(jié)構(gòu)

　　常用的強調(diào)句結(jié)構(gòu)是it 引導的句子，結(jié)構(gòu)為It is(was)+ 被強調(diào)部分+ that (who) + 句子的其余部分。此結(jié)構(gòu)強調(diào)的成分限于主語，賓語和狀語。例如：

　　It is from the sun that we get light and heat. 我們是從太陽那兒獲取光和熱。

　　It was not until I had read your letter that I understood the true state of affairs. 知道讀了你的信，我才知道實際情形。

　　典型例題

　　1)It was last night ___ I see the comet.

　　A. the time B. when C. that D. which

　　答案C. 強調(diào)句的結(jié)構(gòu)是： It +be +強調(diào)部分 + that (who))+ 主謂句。 強調(diào)句的連詞只有兩個，that和who。當強調(diào)的部分是人，且為句子的主語時，才用 who，其余用that。再如：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.

　　2)It is ten years ___ Miss Green returned to Canada.

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