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语法用法

一些以现在完成时构造的例句,让你更好地理解该时态的用法

1、She didn't go to bed until she had finished her work.她直到把工作做完之后才睡觉。2、I have owned a puppy before.我以前养过一只小狗。3、How long have you been working in this
2023-09-21