The stone each ___ as much as two tons.A.weighs B.are weighed C.weigh D.is weighed与 each of the stones ___ as much as 的区别
问题描述：
The stone each ___ as much as two tons.
A.weighs B.are weighed C.weigh D.is weighed
与 each of the stones ___ as much as 的区别
答
选A
我理解的话，each在这里是副词，不影响动词，所以只需要看主语，stone是单数，所以动词用单数，故选A
each of stones,这时each是代词，表示多数当中的一个，做主语时后面动词也用单数，还是weighs
但是当 stones each ___as much as two tons时，这时each又是副词，所以只看主语，主语是复数，所以后面动词要用动词原形 也就是 weigh.
答
weighs
答
A
主语是stone,each 是主语的同位语
第二句还是选A,只不过是each 做主语
此两句,表达方式不同,但意思一样
还可以改写为：
The stone 【weighs】as much as two tons 【each】
此句,each 作副词,一般置于句尾.意思一样
答
区别是第一个句子的主语是the stone, 第二个是each，但它们都是单数，所以答案是一样的，选A, weigh这里是不及物动词，不用被动语态，“称起来……”