Answer :
Examples
1) I need TO STUDY grammar
Here TO STUDY is used and noun.
2) I use Branly TO STUDY grammar
Here TO STUDY is an adverb, because it is mofifiyng the verb use
1) I need TO STUDY grammar
Here TO STUDY is used and noun.
2) I use Branly TO STUDY grammar
Here TO STUDY is an adverb, because it is mofifiyng the verb use