Which sentence uses correct subject-verb agreement?
The alligators slips quietly into the water.
The alligators slipping quietly into the water.
The alligator slipping quietly into the water.
The alligator slipped quietly into the water.
The correct answer is The alligator slipped quietly into the water.
The first sentence does not agree since alligators should be a singular form, while the second and third are nonsensical because of lack of information.
