強(qiáng)調(diào)：　　強(qiáng)調(diào)是一種修辭方式，如前面所說的倒裝就是一種重要的強(qiáng)調(diào)手段。　　此外，還可以借助助詞進(jìn)行強(qiáng)調(diào)，例如：　　She did come yesterday; I saw her in the office.　　本講要討論的主要是it is .that強(qiáng)調(diào)句, 即：將句子中除謂語動(dòng)詞以外的成分用it is .that加以連接，組成強(qiáng)調(diào)句，如果是人，也可以用it is who, 例如：　　John bought a toy train for his son yesterday.　　強(qiáng)調(diào)主語：It was John who bought a toy train for his son yesterday.　　強(qiáng)調(diào)賓語：It was a toy train that John bought for his son yesterday.　　強(qiáng)調(diào)賓語：It was for his son that John bought a toy train yesterday.　　強(qiáng)調(diào)時(shí)間狀語：It was yesterday that John bought a toy train for his son .　　學(xué)習(xí)強(qiáng)調(diào)句要注意以下兩點(diǎn)：　　不要與主語從句相混淆，例如：　　It is well known that light travels in straight lines.　　It was not until the early 18th century that the significance of the event was generally realized.　　強(qiáng)調(diào)句與主語從句的簡(jiǎn)單區(qū)分是：強(qiáng)調(diào)句去掉it isthat,句子結(jié)構(gòu)依然正確，意思不變，如上句：until the 18th century the significance of the event was not generally realized. 但是主語從句就不行，如上句：well know that light travels in straight line就不通, 句中 well know 變成了無依著的成分。　　不要陷入考試陷阱，例如：　　It was not until 1943 ______ Penicillin was put into clinical use that many fatal diseases were brought under control.　　A.that　　B.when　　C.before　　D.after　　看到這個(gè)題目，考生第一個(gè)反應(yīng)是強(qiáng)調(diào)句，很快選擇了A，但是再仔細(xì)讀一下，句子后面已經(jīng)有that，說明這個(gè)題目的考點(diǎn)不在強(qiáng)調(diào)句上，而是考定語從句的關(guān)系副詞when, 故正確答案是B，A稱為干擾項(xiàng).

　　強(qiáng)調(diào)：　　強(qiáng)調(diào)是一種修辭方式，如前面所說的倒裝就是一種重要的強(qiáng)調(diào)手段。　　此外，還可以借助助詞進(jìn)行強(qiáng)調(diào)，例如：　　She did come yesterday; I saw her in the office.　　本講要討論的主要是it is .that強(qiáng)調(diào)句, 即：將句子中除謂語動(dòng)詞以外的成分用it is .that加以連接，組成強(qiáng)調(diào)句，如果是人，也可以用it is who, 例如：　　John bought a toy train for his son yesterday.　　強(qiáng)調(diào)主語：It was John who bought a toy train for his son yesterday.　　強(qiáng)調(diào)賓語：It was a toy train that John bought for his son yesterday.　　強(qiáng)調(diào)賓語：It was for his son that John bought a toy train yesterday.　　強(qiáng)調(diào)時(shí)間狀語：It was yesterday that John bought a toy train for his son .　　學(xué)習(xí)強(qiáng)調(diào)句要注意以下兩點(diǎn)：　　不要與主語從句相混淆，例如：　　It is well known that light travels in straight lines.　　It was not until the early 18th century that the significance of the event was generally realized.　　強(qiáng)調(diào)句與主語從句的簡(jiǎn)單區(qū)分是：強(qiáng)調(diào)句去掉it isthat,句子結(jié)構(gòu)依然正確，意思不變，如上句：until the 18th century the significance of the event was not generally realized. 但是主語從句就不行，如上句：well know that light travels in straight line就不通, 句中 well know 變成了無依著的成分。　　不要陷入考試陷阱，例如：　　It was not until 1943 ______ Penicillin was put into clinical use that many fatal diseases were brought under control.　　A.that　　B.when　　C.before　　D.after　　看到這個(gè)題目，考生第一個(gè)反應(yīng)是強(qiáng)調(diào)句，很快選擇了A，但是再仔細(xì)讀一下，句子后面已經(jīng)有that，說明這個(gè)題目的考點(diǎn)不在強(qiáng)調(diào)句上，而是考定語從句的關(guān)系副詞when, 故正確答案是B，A稱為干擾項(xiàng).