高中英语Unit8 Protecting the Environment句型PPT1 课件VIP免费

强调句型 一、基础知识强调句型是英语中常见句子结构，又是高考中的常见考点，其基本结构为“ It + be + 被强调部分 + that ／ who+句子其余部分”，具体用法如下：1 ．强调句型可强调的句子成分通常为主语、状语、宾语等，不能用来强调谓语动词、表语 ( 主语补语 ) 、让步状语、条件状语等；如： It was in the park that I met my old teacher yesterday ． ( 强调地点状语 ) It was yesterday that I met my old teacher in the park ． ( 强调时间状语 ) It was my old teacher that I met in the park yesterday ． ( 强调宾语 ) It is Mr Smith who ／ that thinks Tom is a clever boy ． ( 强调主语 ) 2 ．在强调句型中，连接词一般用 that 。如被强调的部分指人时，可用 who(m) ／ that ，其他一律用 that ，不能用 which ，where ， when 等。如：It was at the gate that we met the inspectors this morning ．It is our parents ， that ／ whom we often turn to for help ．3 ．在强调结构中，无论被强调的是人还是物，是单数还是复数， be 动词一律用 is ／ was 形式，如果原句的谓语动词是一般过去时，就用 was ； 如果是一般现在时，就用 is 。也可以用“情态动词 +be” 形式。如：It is the monitor who wins the first prize in the exam ．It was the farmers who ／ that lived a hard life be fore liberation ．It might be yesterday that John bought a book for Mary ．It will be Xiao Wang who go with you ． 4 ．强调句型也有疑问句形式。一般疑问句的强调形式，只需将is ／ was 提前，移至句首即可，即：“ Is ／ Was it…that…” 。特殊疑问句的强调形式，须将陈述句变成一般疑问句，再在句首加上疑问词，即“疑问词 ( 被强调部分 )+is ／ was + it + that + 句子其余部分”。如：Was it last year that the building was completed?How was it that he went to school?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… 结构在强调句型中的运用： until 引导...