Question

alice had nothing to do to do在句中做什么成分

Answer 1

定语，修饰nothing，属于动词不定式作后置定语

Answer 2

to do是动词不定式作后置定语。
一、动词不定式的用法。
动词不定式是动词的一种非限定形式，由to加动词原形构成，在句中起名词、形容词和副词的作用，同时也保留动词的一些特征，可以带宾语、状语和宾语补足语等。
二、动词不定式的功能。
1. 作主语。
To think of you makes me old.
It makes me old to think of you.
It would be wrong fr people to marry for money.
It was annoying of James to lose my bike.
To see is not always to believe.
2. 作表语。
My work is to prepare dinner.
Little remains to do.
3. 作动词宾语。有一些动词适合接不定式作宾语。
He likes to play baseball.
I find it difficult to work with him.
She made it a rule to get up at five.
Never did I think to meet you here.
She doesn't care to spend much time with her relatives.
4. 作介系词宾语。
It had no effect except to make her angry.
My father being in poor health, I could do nothing but give up university.
5. 作宾语补语。
I want you to tell me the truth.
What caused her to give up her studies?
I'll get the students to try again.
I should dislike the students to smoke.
I know this to be a fact.
Never have I known John tell a lie.
有一些动词，如bid、have、let、listen to、look at、make后面的动词不定式是不带to的，叫做原形不定式。
6. 作定语。
动词不定式与其所修饰的字之间可有主谓关系和动宾关系。
Amy was the only woman to remember my birthday.
I didn't have a chance to speak English in Japan.
Give me something to eat.
I have my parents to take care of.
The man to come to our rescue is Richard.
7. 作状语。
He went to that restaurant to eat pizza.
She tried to kill herself only to be saved.
What have you done to get in your boss's hair?
The tea is too hot to drink.
You are so kind to help us.
We divided the work, he to clean the windows and I to sweep the floor.
She was so angry as to be unable to speak.
希望我能帮助你解疑释惑。