Could you explain why we should put here to be thanks in advance
Why the following sentences requite to be why these sentences are incorrect
I a pupil
he a pupil
they pupils
Could you explain why we should put here to be thanks in advance

Question

Could you explain why we should put here to be thanks in advance
Why the following sentences requite to be why these sentences are incorrect
I  a pupil
he  a pupil
they pupils
Could you explain why we should put here to be thanks in advance

Answer

Nominal sentences require a verb. #neomi is correct.

Answer

I am a pupil
He is a pupil
They are pupils

You need to use those verbs so the sentence has meaning, instead of being just one word after the other.