He has a good understanding of the English language, needs to work on sentence structure, and using the correct grammar, I believe he can improve at a good pace, just needs to converse, and engage in conversation. his fluency needs to improve. So learning the sounds of the alphabet is a must, If he does he will improve, Which is his goal.
Update:
He has improved, in his grammar and sentence structure. Since he hasn't been to class much, I can't evaluate on any progress.