Answer:
1. He certainly gave me something to think about.
2. Billie is finally ready to go.
3. I climbed the mountain to see the view.
4. I can't afford to eat out tonight.
5. Do you swear to tell the truth?
6. Mom volunteered to make cookies for the bake sale.
7. He appears to have the measles.
8. They planned to go on a road trip.
9. He would prefer to eat steak.
10. She claimed to have been home on the night in question.
11. Sam offered to help me study.
12. The company decided to give everyone a raise.
13. I can arrange to have the day off.
14. Dave failed to come to work on time.
15. Jim always forgets to greet.
16. To fly around the world requires a lot of time and money.
17. You promised to buy me a diamond ring.
18. Tara has the ability to succeed.
19. I convinced Catherine to be vegetarian.
20. He advised me to sell all my shares of stock.
Step-by-step explanation:
Infinitive: An infinitive is verbal that is formed by adding "to" before the first form of the verb and it functions as noun (subject/object), adjective, or adverb.
to think (sentence 1 , to go (sentence 2) are used as nouns (objects). To fly (sentence 16) is used as noun (subject). to see (sentence 3) is used as adverb, telling why I climbed the mountain. A good novel to read is "War and Peace" to read is used as adjective to modify a good novel (to read)
Verbal: Verbal is a word formed from a verb but functions as something else (not as verb) e.g to go, flying in flying birds look pretty.