题目内容
3.My father suggests that I should take some notes while listening to the teachers in class.( )A. | if necessary | B. | if so | C. | if not | D. | if ever |
分析 我爸爸建议我在课堂上听老师讲课时有必要的时候要记一下笔记.
解答 答案:A.
本句中实际上是if引导的条件状语从句的省略,省略了it is,即if it is necessary,故选A.if so如果这样的话,if not如果不是的话,if ever如果曾经这样,这几项均不符合句意及语境,可排除;其中that引导的为动词suggest的宾语从句,while引导的实际上也是时间状语从句的省略,省略了I am.
点评 在if,while,when以及unless等引导的时间、条件、让步等状语从句中,如果从句的主语和主句的主语一致,且从句中含有be动词,或者从句中的主语为it时,可以省略从句中的主语和be动词.
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