her cousin did homework each days beforel walked to school 句型转换 walked to school 为划线部分i went to school on foot对划线部分提问哦 要是全划上了就只能是what did you do 了吧对了 上边那个句子应该是each day before因为each修饰名词应用单数，刚才着急打错了he saw my mother yesterday 改为否定句he didn't see my mother yesterdayt i g r e能组成什么单词tiger老虎