求专业人士进：是have been increased 还是have increased?两种用法我都看到过,是都可以用无区别还是有区别并且分不同的情况使用?The production of grain has been increased by four times this year.为什么这里用have been increased?
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这个有been的是被动式,要看你前面的这个主语是否能自动增长,这个要仔细体会的,1.As bear's numbers have increased, conflicts with local people have also,2.As temperature have increased in recent decades,这...