一、概說
英語中表示強調(diào)的方式很多，如口語可用重讀來表示強調(diào)，書面語中表示強調(diào)則較多，如一個比較的簡單的辦法就是在謂語動詞前加do：
He does speak well! 他的確講得很精彩。
He did said that. 他的確說過那話。
有時也可將要強調(diào)的成分置一句首：
This the students can understand. 這一點學(xué)生們是理解的。
Standing beside the table was his son. 站在桌旁的是他的兒子。
本章討論的是使用It+be+被強調(diào)成分+that (who)…這一強調(diào)句型來表示強調(diào)。
二、強調(diào)句的基本結(jié)構(gòu)及用法
1. 基本結(jié)構(gòu)：It+be+被強調(diào)成分+that (who)…
He bought the book in this shop yesterday.
→It was he that bought the book in this shop yesterday. (強調(diào)主語he)
→It was the book that he bought in this shop yesterday. (強調(diào)賓語the book)
→It was in this shop that he bought the book yesterday. (強調(diào)地點狀語in this shop)
注：在該強調(diào)結(jié)構(gòu)中，it is (was)…that (who)…為結(jié)構(gòu)詞，它通常可以省略，而不影響句子的意思。
2. 關(guān)于that與who
當(dāng)被強調(diào)部分指人時，可以用who代that；當(dāng)被強調(diào)部分指物時通常用that。注意：強調(diào)事物時，通常不宜用which來代that，另外當(dāng)強調(diào)時間或地點狀語時，通常也不能用when / where代that(尤其是當(dāng)這些狀語為介詞短語時)。
3. 關(guān)于被強調(diào)成分
該強調(diào)句型中，被強調(diào)的成分除了是名詞、代詞、介詞短語等之外, 也可以是從句：
It is when he got back that he knew what had happened. 他回來后才知道所發(fā)生的情況。
It was because he loved my money that he married me. 他是因為愛我的錢才同我結(jié)了婚。
注：(1) 該句型可強調(diào)because引導(dǎo)原因狀語從句，但通常不能強調(diào)由 since, as引導(dǎo)的原因狀語從句，另外也不強調(diào)由although引導(dǎo)的讓步狀語從句。
(2) 該句型可以強調(diào)主語，但不強調(diào)表語。
三、兩種值得注意的強調(diào)句結(jié)構(gòu)
1. 強調(diào)句的特殊疑問句形式
強調(diào)句型的陳述句形式和一般疑問句形式一般還好理解，但若以特殊疑問句形式出現(xiàn)，則很容易誤解。比較：
Jim told us the news.(非強調(diào)句)
It was Jim that told us the news.(強調(diào)句型的陳述句形式)
Was it Jim that told us the news.(強調(diào)句型的一般疑問句形式)
Who was it that told us the news.(強調(diào)句型的特殊疑問句形式)
特殊疑問句形式的強調(diào)句可視為對陳述句強調(diào)中的被強調(diào)成分提問得來，如對It was yesterdaythat he arrived. 這一句中的yesterday提問，即得到When was it that he arrived?
2. not...until用于強調(diào)句
其基本形式為It is (was) not until…that…。比較：
He didn’t come until his wife left. 他妻子走了之后他才來。
It was not until his wife left that he came. 他妻子走了之后他才來。
They didn’t start until the rain stopped. 直到雨停他們才出發(fā)。
It was not until the rain stopped that they started. 直到雨停他們才出發(fā)。
