2、使用"It is/was…that"強(qiáng)調(diào)句型要注意的幾點(diǎn)

　�。�1）被強(qiáng)調(diào)部分指人時(shí)，其后除了用that之外，也可用who或whom。強(qiáng)調(diào)的是主語(yǔ)時(shí)，使用who；強(qiáng)調(diào)的是賓語(yǔ)時(shí)，使用whom。

　　It was Mary who picked up the wallet. 是瑪麗拾到了那個(gè)錢(qián)包。

　　It was one of my old schoolmates whom I visited yesterday. 我昨天去看的是我的一位老校友。

　　It was Jack that I met in the park last week. 我上星期在公園遇到的是杰克。

　　It was her that I met in the park yesterday. 昨天在公園時(shí)里我遇到的是她。

　　(2)強(qiáng)調(diào)句的時(shí)態(tài)

　　一般說(shuō)來(lái)，原句的謂語(yǔ)動(dòng)詞如果是現(xiàn)在或?qū)��?lái)各種時(shí)態(tài)，則用句型"It is .... that(who, whom) ... 。"如果原句謂語(yǔ)動(dòng)詞是過(guò)去各種時(shí)態(tài)，則用句型"It was ...that(who, whom)...."

　　It was only when I reread his poems recently that I began to appreciate their beauty. 只是在最近我在讀他的詩(shī)時(shí)才開(kāi)始欣賞到它的美。

　　It is Smith who is leaving for Beijing tomorrow. 是史密斯先生明天去北京。

　　(3)在強(qiáng)調(diào)時(shí)間、地點(diǎn)、原因或方式狀語(yǔ)時(shí)，不能用when、where、why或how，只用that。

　　It was because her mother was ill that she didn't go with us. 就是因?yàn)樗�母親病了，她才沒(méi)跟我們一起去。

　　It was in Shanghai that the Chinese Communist Party was founded on July 1, 1921. 中國(guó)共產(chǎn)黨是在上海于1921年7月1日建立的。

　　注意：可用"It is/was because…that…"結(jié)構(gòu)強(qiáng)調(diào)because引導(dǎo)的原因狀語(yǔ)從句，如上例所示，但不能用該結(jié)構(gòu)強(qiáng)調(diào)由since或as引導(dǎo)的原因狀語(yǔ)從句，如不能說(shuō):It is everybody is here that let's begin our discussion.也不能說(shuō): It was as it was raining hard that they had to stay at home.

　�。�4）強(qiáng)調(diào)"not...until"結(jié)構(gòu)

　　在強(qiáng)調(diào)"not...until"結(jié)構(gòu)中由until短語(yǔ)（或從句）表示的時(shí)間狀語(yǔ)時(shí)，要用固定的強(qiáng)調(diào)句型"It is/was not until ... that ... 。" 其中that從句中的謂語(yǔ)動(dòng)詞用肯定式。

　　My father did not come until 12 o'clock last night.

　　= It was not until 12 o'clock last night that my father came home.昨晚直到十二點(diǎn)我父親才回家。

　　It was not until his father came in that the boy began to prepare his lessons. 直到她爸爸進(jìn)來(lái)時(shí)，那個(gè)男孩才開(kāi)始復(fù)習(xí)功課。

　　It was not until she came to see us that we knew her mother was ill in bed. 直到她來(lái)看我們時(shí)，我才知道她媽媽臥病在床。

　�。�5）在強(qiáng)調(diào)一般疑問(wèn)句中的某一成分時(shí)，主句要用一般疑問(wèn)句的語(yǔ)序。

　　Did this happen in Guangzhou?

　　=Was it in Guangzhou that this happened? 此事是在廣州發(fā)生的嗎？

　　Was it in 1969 that the American astronaut succeeded in landing on the moon？是在1969年美國(guó)宇航員成功登上月球的嗎？

　�。�6）特殊疑問(wèn)句中只有疑問(wèn)詞可以強(qiáng)調(diào)，其強(qiáng)調(diào)結(jié)構(gòu)是："疑問(wèn)詞+is/was it +that … ？"

　　When did you get to know her?

　　=When was it that you got to know her? 你是在什么時(shí)候認(rèn)識(shí)她的？

　�。�7）可以強(qiáng)調(diào)方式狀語(yǔ)和以because引導(dǎo)的原因狀語(yǔ)從句。

　　It was unwillingly that he did it for me. 他是不情愿地替我做的那件事。

　　It was because he was ill that we had to come back early. 正是因?yàn)樗�病��，我們才不得不早歸。

　�。�8）可以強(qiáng)調(diào)賓語(yǔ)補(bǔ)足語(yǔ)，當(dāng)連系動(dòng)詞不是be，表語(yǔ)部分是名詞性詞組時(shí)，也可使用這種結(jié)構(gòu)強(qiáng)調(diào)表語(yǔ)，但是，當(dāng)連系動(dòng)詞是be時(shí)，不能強(qiáng)調(diào)表語(yǔ)。

　　It is white that they painted the house. 他們把房子漆成的是白色。（強(qiáng)調(diào)賓語(yǔ)補(bǔ)足語(yǔ)）

　　It is a chief engineer that he becomes now. 他現(xiàn)在擔(dān)任的是總工程師。（強(qiáng)調(diào)表語(yǔ)）

　�。�9）強(qiáng)調(diào)句的謂語(yǔ)動(dòng)詞除了可采用現(xiàn)在時(shí)和過(guò)去時(shí)的單數(shù)形式外，有時(shí)根據(jù)需要還可采用復(fù)雜的形式。

　　It must have been Mary that you saw just now. 你剛才看到的一定是瑪麗。