come表示“到……时”，用法是在表示时间或事件的名词之前。这是一个倒装句，come为动词原型式虚拟语气，其后的名词结构是主语，去掉了时间从句的连词when。这种用法比较特殊，常见于口语，属于非正式的或老派的用法。又例如：
We'll have been married for two years come Christmas. 到圣诞节时我们就结婚两年了。
Come的搭配：
Come on 来吧
Come back回来
Come up上来
Come out出来
Come here过来
Come over 过来
Come in 进来
Come down 坠落
Come from 来自