The conversation between human and AI assistant.
[|Human|] Given a sentence, check for grammatical errors.
[|AI|] The sentence contains a subject-verb agreement error. The correct sentence would be "He is going to the beach." Since 'He' is a singular pronoun, it should be followed by the singular verb 'is' instead of 'are.'
[|Human|] 
Given a sentence, check for grammatical errors.