He runs faster than they do.
我不明白的是到底什么时候than后面要加像do这样的?什么时候又不加? 还有一个问题就是有没有有必要去细扣语法,把每个都搞懂,每次都会陷入这样的危机感中。
He runs faster than they do.
我不明白的是到底什么时候than后面要加像do这样的?什么时候又不加?
【答】1. 在“比较级 + than +主语”后面应该加 像do 等操作词,这时,than 是连词,引导一个比较状语从句。具体加什么什么操作词,应该根据主句谓语动词的类型和时态来决定。例如,刘老师的几个例句:
He runs faster than they do. (主句谓语动词runs是实义动词一般现在时, than 从句的主语是they,后面应该加一般现在时的助动词do.)
He ran faster than they did.(主句谓语动词ran是实义动词一般过去时, than 从句的主语是they,后面应该加一般过去时的助动词did.)
He is faster than they are. (主句谓语动词is是系动词一般现在时, than 从句的主语是they,后面应该加一般现在时的系动词are.)
He can run faster than they can.(主句谓语动词can是情态动词, than 从句的主语是they,后面应该加情态动词can)
He will run faster than they will.(主句谓语动词will run 是实义动词一般将来时, than 从句的主语是they,后面应该加一般将来时的助动词will.)
2. 在“比较级 + than + 宾语”后面不能加 像do 等操作词,这时,than 是介词。例如:He runs faster than them.
主句和比较从句,对应的成分如果重复,都可省略不说。谓语动词可以用“操作词”(助动词、情态动词、be 动词)替代。仔细体会以下各句:
He runs faster than they do.
He ran faster than they did.
He is faster than they are.
He can run faster than they can.
He will run faster than they will.
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