为什么Tree Plating tree在前,而Plating trees tree却在后面呢?

tree tall green tree 为什么是tall在前 apple trees为什么在tree后面加s,而apple后面不加呢? A tree,Trees ,The tree,有什么区别, there are no trees还是no tree under-plating tree day,tree ear,family tree family tree, family tree climb_____the tree tree是什么意思! tree是什么意思