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Your college roommate just brought home a wild raccoon as a pet, and absolute chaos has taken over your dorm room. Select ALL the grammatically correct sentences that give them advice on how to handle the situation.
The correct answers are You shouldn't leave your snacks on the counter anymore. and He should apologize to the landlord before we get evicted.
The modal verb "should" is the same for all subjects (I, you, he, she, it, we, they) and is always followed by a base verb without an "s" (so "should calls" is incorrect).
To make it negative, we use "should not" or "shouldn't". We never use "don't" or "doesn't" with modal verbs (so "don't should keep" is incorrect).