The correct form is "They're playing football in the field," using the contraction for "they are."
Identify the sentence with correct use of the parallel structure:
Choose the sentence with correct use of the hyphen:
What is the correct form of the sentence? "The professor, along with her students, are attending the conference."
What is the correct form of the sentence? "The committee members has submitted their reports."
Identify the sentence with correct use of the appositive phrase:
In the sentence, "The cat meowed loudly," what is "loudly"?
Identify the sentence with correct use of the ellipsis:
Choose the adverb in the sentence: "He works diligently."
Choose the compound sentence:
What is the correct form of the sentence? "The report was wrote by the team."