is the sentence correct?

English as a Second Language English Vocabulary, Grammar and Idioms
1

I haven’t done the homework and my brother hasn’t either

2

She has never been too demanding, nor does she plan to be so now

3

the more they have the more they want

4

Hello Zangar,

Punctuation is important. Without it your writing can be misinterpreted (or may even be unintelligible).
The more they have, the more they want.