my mother and myfather ( )work yesterday

问题描述:

my mother and myfather ( )work yesterday

didn't
你要否定句,也就意味着你要这样的意思:我父母昨天没有工作,工作(work)在这里是一个动词,你要否定它,你就必须加一个助动词do,然后用它的否定形式,由于是yesterday(昨天),你要注意时态,所以用的是它的过去式didn't.