Identify the infinitive phrase.

1. While the train was stopped at the station, Bugsy attempted to climb to the top of one of the freight cars.

Ans: to climb to the top of one of the freight cars?

2. During the Great Depression, audiences wanted to laugh when they went to the movies.

Ans: to laugh when they went to the movies?

3. Every Wednesday, six women from Wisbech came to the castle to do the weekly wash.

Ans: to do the weekly wash

4. On the last night of the retreat, we wanted to sing a song to end an evening that had been particularly touching to us all.

Ans: to sing a song & to end an evening

5. The duke left the duchess at a Red Roof Inn and proceeded to drive to the country to see his mother.

Ans: to drive to the country & to see his mother

6. At the end of their long adventure, Lucy and Edmond are told that they are too old to return to Narnia again.

Ans: to return to Narnia again

Identify the appositive phrase
1. High-definition television, HDTV, has cinema quality images.

Ans: HDTV

2. Seneca, the Roman philosopher and statesman, was actually born in Cordoba, Spain.

Ans: the Roman philosopher and statesman

3. A four-time recipient of the Pulitzer Prize, Robert Frost was the first poet to read a poem at the presidential inauguration.

Ans: a four-time recipient of the Pulitzer Prize

4. French and Spanish, both Romance languages, share many similar words.

Ans: both Romance languages

5. Several works by Caravaggio, Sandra's favorite painter, are on display.

Ans: Sandra's favorite painter

What are the question marks for?

Infinitive phrases are fine, except I'm not sure about #4. You might need to add the "that" clause to the second infinitive phrase.

All the appositive phrases are fine.

2. Don't include a clause in an infinitive phrase.

The question mark was because i wasn't sure of the answer. Not sure about statement - Don't include a clause in an infinitive phrase. is this for #4 (infinitive phrase)? so the answer would be to sing a song and to end the evening (without adding that had been particularly touching to us all)?

Sentence number 2 has a clause that you included in the infinitive phrase.

To identify the infinitive phrase in each sentence, look for a verb form preceded by the word "to." The infinitive phrase will consist of the word "to" followed by the base form of the verb.

1. While the train was stopped at the station, Bugsy attempted to climb to the top of one of the freight cars.
Infinitive phrase: to climb to the top of one of the freight cars.

2. During the Great Depression, audiences wanted to laugh when they went to the movies.
Infinitive phrase: to laugh when they went to the movies.

3. Every Wednesday, six women from Wisbech came to the castle to do the weekly wash.
Infinitive phrase: to do the weekly wash.

4. On the last night of the retreat, we wanted to sing a song to end an evening that had been particularly touching to us all.
Infinitive phrases: to sing a song & to end an evening.

5. The duke left the duchess at a Red Roof Inn and proceeded to drive to the country to see his mother.
Infinitive phrases: to drive to the country & to see his mother.

6. At the end of their long adventure, Lucy and Edmond are told that they are too old to return to Narnia again.
Infinitive phrase: to return to Narnia again.

To identify the appositive phrase in each sentence, look for a noun or pronoun that renames or describes another noun immediately before or after it, separated by commas.

1. High-definition television, HDTV, has cinema quality images.
Appositive phrase: HDTV.

2. Seneca, the Roman philosopher and statesman, was actually born in Cordoba, Spain.
Appositive phrase: the Roman philosopher and statesman.

3. A four-time recipient of the Pulitzer Prize, Robert Frost was the first poet to read a poem at the presidential inauguration.
Appositive phrase: a four-time recipient of the Pulitzer Prize.

4. French and Spanish, both Romance languages, share many similar words.
Appositive phrase: both Romance languages.

5. Several works by Caravaggio, Sandra's favorite painter, are on display.
Appositive phrase: Sandra's favorite painter.