Question

que Was y que es Wer

Answer 1

Es el pasado del verbo "To be" ser/estar
Was se utiliza para singular (I, he, she, It)
Were se utiliza para plural (We, You, They)

Answer 2

Was y were son el verbo to be pero en pasado, en presente son I, is, are; pero en pasado solo se utilizan dos: was, were; was para (i,she,he,it) y were para (you,we,they).
En negativo se utilizan de dos formas: was not o wasn't; were not o weren't
Si quieres más información, lee este link: https://www.papora.com/es/guia-gramatica-inglesa/was-were/
Espero que entiendas ;)