Identify the infinitive in the following sentences and it's function.

Question

1. The librarian was happy to help.
Infinitive is to help
The function of the infinitive is direct object

2. His greatest wish, to fly, was never fulfilled.
Infinitive is to fly
Function- Predicate noun

3. This is the best reference book to consult.
Infinitive - to consult
Function- Adjective

4. Susan's dream is to dance.
I - to dance
Function- Predicate noun

5. To whistle is difficult for some people.
I- to whistle
Function- (subject)

Answer 1

1. The librarian was happy to help.
Infinitive is to help - yes
The function of the infinitive is direct object - No. Direct objects follow transitive verbs.

2. His greatest wish, to fly, was never fulfilled.
Infinitive is to fly - Yes
Function- Predicate noun - No

3. This is the best reference book to consult.
Infinitive - to consult - Yes
Function- Adjective - Yes

4. Susan's dream is to dance.
I - to dance - Yes
Function- Predicate noun - Yes

5. To whistle is difficult for some people.
I- to whistle - Yes
Function- (subject) - Yes

http://www.dailywritingtips.com/5-uses-of-infinitives/

Answer 2

1. adverb
2. adjective

Answer 3

1. adverb - yes
2. adjective - no
It's an apositive.

Answer 4

Thank

Answer 5

Welcome.