Question

In which sentence is the underlined phrase an adverb phrase?

A. The students in Mr. Bruns’s class planned a party for his retirement.

B. Mr. Bruns had been teaching for 35 years.

C. The students gave Mr. Bruns a book of his favorite verses.

D. The students called several of Mr. Bruns’s former students.

Answer 1

The best example of an adverb phrase is B. Mr. Bruns had been teaching for 35 years. 

This is an adverb phrase, because the phrase "for 35 years" answers the question of how long Mr. Bruns had been teaching. The verb is "teaching", and "for 35 years" modifies this verb. 

Answer 2

the answer is B pal.