今天我们将学习两个新的不规则动词know-knew（知道）与leave-left（离开）并复习动词make-made（做）。请学习以下例句：My grandma knew many things.（我奶奶知道很多事）My grandma didn’t know many things.（我奶奶不曾知道很多事情）Did your grandma know many things?（你奶奶以前知道很多事情吗）My mom left for work.（我妈妈去工作了）My sister left for school.（我妹妹去学校）My mom didn’t leave for work.（我妈妈没有去工作）My sister didn’t leave for school.（我妹妹没有去学校）不规则动词make的过去时为made：Yesterday I made a cake.（昨天我做了一个蛋糕）Yesterday I didn’t make a cake.（昨天我没有做一个蛋糕）Did you make a cake yesterday?（你昨天做蛋糕了吗）