1. 強調(diào)句型中，能夠被強調(diào)的句子成分通常為主語、狀語、賓語等，不能用來強調(diào)謂語動詞、表語、補語、讓步狀語、條件狀語等。

       例如 It was in the park that I mat my old teacher yesterday. (強調(diào)地點狀語) 
       It is Mr. Smith that thinks Tom is a clever boy. （強調(diào)主語）

       2． 強調(diào)句型中，連接詞一般用that，如被強調(diào)的部分是人，也可用who/whom，其他一律用that，不能用which, where, when等，即使被強調(diào)的是物、時間狀語或地點狀語。

       例如 It was at the gate that we met the inspectors this morning. 
       It is our head-teacher that/ who/whom we often turn to for help.

       3． 強調(diào)結(jié)構(gòu)中，無論被強調(diào)的是人還是物，單數(shù)還是復(fù)數(shù)，be動詞一律用單數(shù)is/was形式，如果原句的謂語動詞是一般過去時，就用was; 是一般現(xiàn)在時，就用is。也可以用"情態(tài)動詞＋be"形式。

       例如 It was the farmers that lived a hard life before liberation. 
       It might be yesterday that John bought a book for Mary.

       ４. 強調(diào)句型也有疑問句形式，包括一般疑問句、特殊疑問句和反意疑問句。一般疑問句的強調(diào)形式，只需將is/ was 提前，移至句首即可，即：Is/ Was it … that …。特殊疑問句的強調(diào)形式，須將陳述句變成一般疑問句，再在句首加上疑問詞，即：疑問詞（被強調(diào)部分）＋is/was + it + that + 句子其余部分。

       例如 Was it last year that the building was completed？ 
       Where was it that you met your English teacher？ 
       It was the day before yesterday that you lost the money, wasn't it？

       ５. not … until…結(jié)構(gòu)在強調(diào)句型中的運用：until引導(dǎo)的時間狀語從句，也可以用在強調(diào)句型中，但主要是其否定形式，如用在強調(diào)句型中，必須將not前移，寫成It is/was not until … that … 。

       例如 It was not until the class began that he came in. 
       It was not until last Friday that he finished reading the book.

       ６. 當強調(diào)的是主語時，其謂語動詞應(yīng)和被強調(diào)的人和物保持人稱、數(shù)的一致。如果被強調(diào)的主語是人稱代詞，宜用主格，間或也可用賓格。

       例如 It is I who am going to attend the meeting. 
       It was I/me who cleaned the classroom.

       7. 強調(diào)句型最容易與定語從句、主語從句和狀語從句一起考查，應(yīng)是學(xué)習(xí)和復(fù)習(xí)的重點。一般說來，如果把句子中的It is/ was … that去掉，稍加調(diào)整語序，能還原成完整句子，并且句子意思依然完整，則為強調(diào)句型；否則，應(yīng)為其他句式。

       例如 It was a small house that I used to live in. (定語從句) 
       It was at the school gate that I met an old friend of mine.（強調(diào)句型）