Many adults' mostwonderful memories are of playing baseball when they were kids.
请问句中的 are of playing 是什么语法?
我感觉这里的 are of playing baseball 可理解为在 of 前面省略了 ones / those (=memories),即:
Many adults' most wonderful memories are of playing baseball when theywere kids.
=Many adults' most wonderful memories are ones / those of playingbaseball when they were kids.