during the past 3 years=in the last 3 years（现在完成时） in the past、last 15 years1.during the past 3 years=in the last 3 years（现在完成时）2.in the past、last 15 years我需要上面两个知识点的解析（区别）、例句,

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during the past 3 years=in the last 3 years（现在完成时） in the past、last 15 years1.during the past 3 years=in the last 3 years（现在完成时）2.in the past、last 15 years我需要上面两个知识点的解析（区别）、例句,

during the past 3 years=in the last 3 years（现在完成时） in the past、last 15 years1.during the past 3 years=in the last 3 years（现在完成时）2.in the past、last 15 years我需要上面两个知识点的解析（区别）、例句,
during the past 3 years=in the last 3 years（现在完成时） in the past、last 15 years
1.during the past 3 years=in the last 3 years（现在完成时）
2.in the past、last 15 years
我需要上面两个知识点的解析（区别）、例句,全面且简洁

during the past 3 years=in the last 3 years（现在完成时） in the past、last 15 years1.during the past 3 years=in the last 3 years（现在完成时）2.in the past、last 15 years我需要上面两个知识点的解析（区别）、例句,
意思其实差不多,就是所接时态不一样,during+时间段 多数跟过去时连用,in+时间段 则与完成时连用；这个知识点多数在单选出现,迷惑性挺高的.
例句：
1.During the past 3 years,the competition between the local and foreign banks spread in many field,and become more and more .
入世三年来,中外银行在各个领域展开了业务的竞争,而且这种竞争还有愈演愈烈之势.
2.Many new materials and technology have been designed in the last 15 years.
在过去的15年中有许多新型材料和技术问世.
In the past 15 years,innate immunity has come into its own.
过去15年来,先天性免疫逐渐受到重视.

during the past与in the past的区别 during the past quarter-cenrury什么意思? (1/3)During the past year,the number of traffic accidents in that city( during the past 50 years用于什么时态 What _____you _____(do) during the past two years? During the past century需要涉及的时态是什么啊? During the past two years与in the past two years区别 during the past 20 years 和 over the past 20 years一样吗? during the past 3 years=in the last 3 years（现在完成时） in the past、last 15 years1.during the past 3 years=in the last 3 years（现在完成时）2.in the past、last 15 years我需要上面两个知识点的解析（区别）、例句, in the last two years/during the last two years/in the past two years/during the past two years有什么区别? My life has changed a lot during the _____ years.A past a few B past few C a few past D few past Great changes have taken place in our hometown during the past ten years.中文意思是什么. great changes ___(take)place during the past few years in our town无 We _(be) there many times during the past three years.填空并翻译 During the past week,I have spent more than eleven hours on my homework.(mo It during the past five years用change a lot 什么时态 是一般过去时还是现在完成时 During the past five years,there ＿＿＿（be）great changes in our village. sightings of hummingbirds have become much more frequent during the past few years的翻译