I disagree with your answers for 1, 4, and 5.
Study this site.
http://www.chompchomp.com/terms/infinitivephrase.htm
Choose the function of the italicized infinitive phrase.
1.May I have permission to use the car tonight?
2.He went to Europe to study architecture.
3.I want to go with you to the store.
4.Can you give me a place to put my things?
5.To help you is my greatest desire.
6.Meredith is to be restored as captain.
1.Noun
2.adverb
3.noun
4.noun
5.adjective
6.noun
5 answers
1.adjective
4.adjective
5.noun
?
4.adjective
5.noun
?
Now they are all correct. :-)
Thanks again. (:
You're welcome.