were 是句子的谓语,有“是”的意思,were you 后跟的是名词,形容词或动词的ing形式,表示你是……吗?比如,were you a teacher?(你是个老师吗?); were you happy?(你是高兴的吗?) were you watching that game at that time?(你那会儿是正在看电视吗?) 其回答是,yes,i was、 no,i wasn't did 是助动词,没意义.did you 后必须跟动词原形,表示你做什么了吗.比如,did you climb the mountain yesterday?(你昨天爬山了吗?)其回答是 yes,i did、 no,i didn't