八年级下册英语书语法:How long have you been skating?I've been skating since nine o'clock.

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八年级下册英语书语法:How long have you been skating?I've been skating since nine o'clock.
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八年级下册英语书语法:How long have you been skating?I've been skating since nine o'clock.
八年级下册英语书
语法:How long have you been skating?I've been skating since nine o'clock.

八年级下册英语书语法:How long have you been skating?I've been skating since nine o'clock.
How long 多久
重点:have been doing 现在完成进行时,强调动作的保持和一直延续的状态
since 此处译为,自从.开始
参考译文:你已经溜冰了多长时间了?
我从9点开始的.
如遇有何不足指出,请高手们不吝指出.