In the Britain,sales of cigarettes( have been reduced) quite a lot in the last ten years为什么要用BEEN 不能直接用HAVE REDUCED

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In the Britain,sales of cigarettes( have been reduced) quite a lot in the last ten years为什么要用BEEN 不能直接用HAVE REDUCED

In the Britain,sales of cigarettes( have been reduced) quite a lot in the last ten years为什么要用BEEN 不能直接用HAVE REDUCED
In the Britain,sales of cigarettes( have been reduced) quite a lot in the last ten years
为什么要用BEEN 不能直接用HAVE REDUCED

In the Britain,sales of cigarettes( have been reduced) quite a lot in the last ten years为什么要用BEEN 不能直接用HAVE REDUCED
在英国,过去十年以来,香烟的销量已经降低了很多
have been 是完成时态的被动语态,香烟的销量是被降低的
have done现在完成时主动语态,所以这里不能用

被动语态。被减少了

这个是现在完成时的被动态。have/has been+过去分词
这里的香烟价钱是被减少,是被动态,而不是主动减少的。
所以不能用have reduced 。

因为这里要用被动语态啊 cigarette是被减少了 be reduced