一道高中英语例题,求详细解析。
Thechildrenwererunningontheplaygroundasfastasthey(can).为什么括号内的can是错误的,要改用could?...
The children were running on the playground as fast as they (can).
为什么括号内的can是错误的,要改用could? 展开
为什么括号内的can是错误的,要改用could? 展开
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