To pass the important the exam.i very late every night over the last three monthsAstudied bhave been studying cwas studying d study 选什么并且说下原因,以及各项的错误之处

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To pass the important the exam.i very late every night over the last three months
Astudied bhave been studying cwas studying d study 选什么
并且说下原因,以及各项的错误之处

b over the last three months 在过去的三个月里,用现在完成时,题目里只有b 为现在完成时.

have been studying ,现在完成进行时,表示过去的三个月里一直在学习.

B 完成时态的标志性时间:over the last three months

B

over the last three months 是现在完成时的标志性状语

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