Look,there're后为什么填appleLook,there're后为什么填appletrees而不是applestrees或者是anappletree请回答时详细说下语法还有个就是Aftertenyeas,alltheseyoungstersbecame后有4个选择题A.growns-upsB.growns-up

Question

Look,there're 后为什么填apple
Look,there're 后为什么填apple trees而不是apples trees或者是an apple tree 请回答时详细说下语法 还有个就是After ten yeas,all these youngsters became后有4个选择题A.growns-ups B.growns-up C.grown-up D.grown-ups 我不明白为什么,请回答时详细说下语法,

Answer 1

there be句型中的are可知后边要加复数名词,而apple trees就表示苹果树的复数,复数形式只加在后边的名词就行了 grow－up是合成词,把它当作一个单词,因为youngers是复数,所以后边的名词也要相应改为复数形式