In the last few years they _ __more than 300 million

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In the last few years they _____ ______more than 300 million trees.
老师讲的答案是have planted
我不太明白可以告诉我理由么

have planted属于have done的形式,典型的现在完成时.
初中阶段现在完成时有两个用处：
1、表示过去发生的,对现在有影响的动作.
2、表示从过去开始,一直持续到现在的动作.
中国的英语考试,一般是很有套路的.
这道题,时间状语是In the last few years,在过去的几年中,很明显的就是从过去发生,一直持续到现在的动作,所以要用现在完成时.
建议你做点题,不用太多,20道就够了,重要的就是掌握套路.

In the last few years they _____ ______more than 300 million in the last few years in the last few years 造句 in the last few years 省略介词 in the last few years是什么时态英语翻译In the last few years ,great cheanges _____(take)place i She _____(learn)over 2000 Enlish words in the last few years Our hometown _____(change)a lot in the last few years. in the last few years=over the years吗 for the last few years和 in the last few years的区别 in the past few years 过去完成时 in the last few years 现在完成时 in t in the past few years和in the last few years的区别,