英语语法问题:Watching TV too much is harmful to the eyes.为什么一定要用动名词做主语?to do不行吗?祈使句动词原形也不行吗?

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英语语法问题:Watching TV too much is harmful to the eyes.为什么一定要用动名词做主语?to do不行吗?祈使句动词原形也不行吗?

To do 也可以做主语,不过它有“未做,表目的“的这一层意思To watch TV too much is harmful to the eyes.(电视都没看,何来伤害)Watching TV too much is harmful to the eyes.(现在分词表示动作正在进行,或保持某...