To practice the subject-verb agreement click on the links below and answer the online quizzes. Be careful with the punctuation marks and capitalization.
Present Simple: affirmative sentences
http://www.ego4u.com/en/cram-up/grammar/exercises?tense=1&level=3&type=positive
Present Simple: negative sentences
http://www.ego4u.com/en/cram-up/grammar/exercises?tense=1&level=3&type=negative
Present Simple: questions
http://www.ego4u.com/en/cram-up/grammar/exercises?tense=1&level=3&type=question
Present Perfect: affirmative sentences
(has + verb in past participle / have + verb in past participle)
http://www.ego4u.com/en/cram-up/grammar/exercises?tense=5&level=4&type=positive
Present Perfect: negative sentences
(hasn't + verb in past participle / haven't + verb in past participle)
http://www.ego4u.com/en/cram-up/grammar/exercises?tense=5&level=4&type=negative
Present Perfect: questions
(Has + subject + verb in past participle/ Have + subject + verb in past participle)
http://www.ego4u.com/en/cram-up/grammar/exercises?tense=5&level=4&type=question
