Learn English – sentence structures using different degrees of adjectives

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I am not a native speaker. I feel very confused whenever I write sentences like the following using comparative or positive degree.I want native speakers to guide me which of the following sentences are right and why.

  1. Dogs are better than any other animals. (or)
    Dogs are better than any other animal.

I know when it comes to a single dog it is right to say 'A dog is better than any other animal.'

  1. No other animal is as faithful as dogs. (or)
    No other animals are as faithful as dogs.

  2. No other person is as good as them. (or)
    No other people are as good as them. (or)
    No people are as good as them. (or)
    No person is as good as them.

  3. No other student in the class is as good as them. (or)
    No other students in the class are as good as them. (or)
    No student in the class is as good as them.

I know with a singular subject it is right to say 'no other student in the class is as good as John.'

And one more question, I heard many people saying 'I don't want anyone better than you'. Is it more correct to say 'I don't want anyone else better than you.'?

Best Answer

The dog is better than any other animal. I like this because "the dog" indicates the species or to be more precise the genus since there are several species I believe.