There was no parks near my home.为什么要用was,不用were

There was no parks near my home.为什么要用was,不用were there were no more mountains in sight.为什么用were 不用was If there was no air, people would die.为什么不用were 英语翻译那为什么用were不用was? how was their holiday 为什么用was而不用were There are a few parks near my home.改否定句 there was no more buses这句话中为什么是was而不是were There were many trees near my home before.(一般疑问句) If I were a boy中,为什么要用were不用was? if I were a boy为什么要用were不用was?求解 为什么用he were而不用he was? there was (were)no n.有no 那后面的名词和was (were)用单数还是复数