Well, all of them have one grammatical error in common, and some of the others have additional errors. For instance, in #1 and #4, the subject and verb do not match.
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nerdikarp1- Every bird have a beak No.The word every is used with singular nouns and singular verbs. Every bird has ... Every bird is ... Every bird wants ... Every bird flies ...
2- Every bird has a beak
3- Every bird is small
4- Every bird are small No.