状语,修饰动词词组took home
1）目的状语　
　　To… only to (仅仅为了),　in order to,　so as to,　so(such)… as to… (如此……以便……)
　　He ran so fast as to catch the first bus.　他飞快地跑以便赶上第一班车.
　　I come here only to say good-bye to you.　我来仅仅是向你告别.
　　2）作结果状语,表事先没有预料到的,要放在句子后面.
　　　What have I said to make you angry.
　　He searched the room only to find nothing.
　　3)　表原因
　　I'm glad to see you.