大学英语：tie to（与…联系在一起；使束缚于…）

　　He is seriously ill and has been tied to his bed for almost a month.　　（他病得厉害，已经卧床近一个月了。）

　　Study ties smoking to many diseases.（据研究，许多疾病与抽烟有关。）

　　I am sorry I didn't have the time to go shopping with you. I was tied to housework.

　　（很抱歉我没能有时间和你一起去购物，家务杂事把我拴住了。）