when it come to后面加什么

　　when it comes to用法

　　when it comes to当涉及某事(或做某事)时

　　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：这里 "to" 是介词)

　　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.

　　众所周知，刚学会走路的孩子不愿和别人分享玩具。