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英语语法求教

2025-03-14 17:29:22

推荐回答（3个）

回答（1）：

把your改为you即可。
do exercise是固定用法，做运动。
这里Doing morning exercise是动名词结构做主语，现在分词形式（ing），过去分词形式（ed），不定式（to do）统称为三大非谓语动词，均不可做谓语，但可做主语，宾语等等。
Doing morning exercise can keep you fit.
Doing morning exercise是主语，can keep是谓语，you是宾语，fit是形容词作宾语补足语。

回答（2）：

把yuor改为you
这句句子的谓语是can keep，所以用非谓语的doing即动名词来做主语

回答（3）：

Doing morning exercise can keep you fit.
Doing动名词做主语

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