his mother took him home to have lunch.to have lunch 做什么成分
问题描述：
his mother took him home to have lunch.to have lunch 做什么成分
答
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.