外研版
应按 of 后面的名词计算。如果名词是不可数名词或可数名词单数,则谓语动词要用单数,如名词是复数则要用复数谓语动词。
[误] Each sides are full of trees
[正] Each side is full of trees
[误] Both side is full of trees
[正] Both sides are full of trees
[析] each, either 其后都要加单数名词,而 both 后要加复数名词。 如: each, either, another, little, a little, much等作主语时,谓语动词全部要用单数形式。
[误] The boys each has an apple