wasn’t和were‘t后面加什么词

wasn’t和were‘t后面加什么词 there weren't和there wasn't什么意思 用 was, wasn't 或 were填空. 用was ,were,wasn't 填空； that was a long time ago,wasn`t it?不懂后面那个wasn`t it,这是一种什么句式? wasn't 和didn't怎么用 wasn't和didn't的用法 can't help后面加什么 数字后面加t什么意思 can′t help 后面加什么? i can't stand 后面加什么 新概念中的选择题：They were quite sure it wasn't.