Question

Which sentence with an introductory phrase is punctuated correctly? Despite missing a month of school, Hector's extra work earned him a B in Algebra II. Despite missing, a month of school, Hector's extra work earned him a B in Algebra II. Despite missing a month of school Hector's extra work, earned him a B in Algebra II. Despite, missing a month of school Hector's, extra work earned him a B in Algebra II.

Answer 1

The sentence that is puntuated correctly is the first one:

Despite missing a month of school, Hector's extra work earned him a B in Algebra II.

In this particular example a coma is needed at the end of the prepositional phrase as it is placed at the beginning of the sentence.