when it comes to用法

　　when it comes to當涉及某事(或做某事)時

　　When it comes to something or when it comes to doing something means when it is a question of something or doing something.

　　Here "to" is a preposition.

　　(注意：這里 "to" 是介詞)

　　例如：

　　1.When it comes to getting things done, he's useless.

　　一涉及做事，他便不中用了。

　　2. Toddlers are notoriously antisocial when it comes to sharing toys.

　　眾所周知，剛學(xué)會走路的孩子不愿和別人分享玩具。