情态动词的用法(3)

主题: 情态动词预学案______________________________________________ 编制人 : 预学人 月 日 一: can .could. be able to 1. I can ride a bike. 2. I couldn't ride a bike two years ago. 3. ____ Could I use your computer? _____ yes, you can. _____ No, you can'...

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