Question

dicaas sobre was, were,did wasn't e weren't

Answer 1

Was and were: verb to be past (passado). Was para singular (I, she,he) e were para plural e coisas e animais (We, it,they, you) 

Was not and were not: forma negativa do verb to be past. As formas contraidas (ou abreviadas) são wasn't e weren't

Espero ter ajudado!