* How? (manner)
* When? (time)
* Where? (place)
* Why? (reason)
* To what extent? (degree)
Here are some examples:
1. Modifying a verb (manner):
* To win the race, she trained tirelessly. (How did she train?)
* He walked to get some fresh air. (How did he walk?)
2. Modifying a verb (time):
* To avoid traffic, they left early. (When did they leave?)
* To see the sunset, we climbed the hill. (When did we climb?)
3. Modifying a verb (purpose):
* We went to the store to buy groceries. (Why did we go?)
* She studied hard to get good grades. (Why did she study?)
4. Modifying an adjective (degree):
* He was too tired to go out. (To what extent was he tired?)
* The cake was easy enough to make. (To what extent was the cake easy?)
5. Modifying an adverb (degree):
* He ran fast enough to win the race. (To what extent did he run fast?)
* She spoke softly enough to be heard. (To what extent did she speak softly?)
Key points to remember:
* The infinitive phrase always starts with "to" followed by a verb.
* The infinitive phrase can be placed before or after the word it modifies.
* It's important to identify the word the infinitive phrase modifies to understand its function.
By understanding how infinitive phrases function as adverbs, you can use them effectively in your writing to add detail and clarity to your sentences.