一般有三种表达方式
1.人做主语,句式sb spend time (in) doing sth. He spends more than 2 hours to play tennisevery day .
2.it 作形式主语it It takes him more than 2 hours to play tennis every day .
3.用cost 表达 ,物作主语: Palying tennis costs him more than 2 hours every day.


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