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应不少条友的私信要求,整理一些基础语法知识,希望对大家的学习有所帮助。本文主要学习《引导表语从句的从属连词(二)》。欢迎留言或私信交流,共同进步。

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根据连词在句中所起的作用,连词可以分为并列连词(用以连接并列的单词、短语或句子的连词)和从属连词(用以引导从句的连词)。从属连词分为引导名词性从句(包括主语从句、宾语从句、表语从句和同位语从句)的从属连词和引导副词性从句(状语从句)的从属连词。引导表语从句的从属连词介绍如下:
2.as if、as though和because引导的表语从句
(1)as if,as though引导的表语从句,可用陈述语气,也可用虚拟语气。例如:
- You look as if you've had a good time . 你看起来好像玩得挺开心。(陈述语气)
- It sounds as though you are from the south of the United States . 听起来你好像来自美国南部。(陈述语气)
- He looks as if he were from the Mars . 他看起来像来自火星。(虚拟语气)
注意事项:as if,as though引导的表语从句常跟在特定的动词后面,如seem, appear, look, taste, sound, feel等。 例如:
- The country, covered with cherry tree flowers, looks as though it is covered with pink snow . 这个国家到处是樱花,看上去就像覆盖着粉红色的雪。
(2)because引导表语从句时,主句的主语不能用reason。例如:
- ---You look tired. 你看起来很累。
- ---That may be because I didn't have a good sleep yesterday evening . 也许是因为我昨晚没睡好。
注意事项:如果主句的主语是reason,表语从句用that来引导,不能用why或because,常见句型为“The reason (why...) is that ...”。 例如:
- The reason why he came late was that he got up late . 他来得晚是因为起晚了。

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