用法就是
one of 後接可數名詞複數,表示什麼中的一個,動詞用單數第三人稱 of the apples has gone bad.但是要注意下面的定語從句:He is one of the boys who enjoy playing basketball.定語從句修飾the is the only one of the boys who enjoys playing 前面有定冠詞the的時候,定語從句是修飾one的,所以動詞要用單三形式.