In the following sentence identify the function of the infinitive (phrase).

Question

Is it too expensive to travel to Europe?

Answer 1

What words make up the infinitive phrase?

Where is that phrase in relation to the other parts of this sentence?

Answer 2

http://www.chompchomp.com/terms/infinitivephrase.htm

http://www.grammar-monster.com/glossary/infinitive_phrase.htm

http://grammar.about.com/od/il/g/Infinitive-Phrase.htm