介绍:
Day52 1我们应该照顾老人。 We should take care of the old. 2一天服药三次。 Take the medicine three times a day. 3你可以再回答一下这个问题。 You can answer it a second time. 4我快速地吃完早饭后,就着急上学了。 After I had a quick breakfast,I hurried to school. 要点: ①不定冠词表示“每一”的意思,相当于each ②不定冠词用于序数词前,表示“再,又”的意思 ③一日三餐前有修饰语时,要加上不定冠词  
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