My mother _____ mathematics in my hometown ever since she graduated from the university.taught teaMy mother _____ mathematics in my hometown ever since she graduated from the university.taught teaches has taught is teaching
问题描述：
My mother _____ mathematics in my hometown ever since she graduated from the university.taught tea
My mother _____ mathematics in my hometown ever since she graduated from the university.
taught
teaches
has taught
is teaching
答
has taught
现在完成时：过去某一时间开始并一直持续到现在的动作或状态。
答
has taught
自从她毕业后就一直在教数学.
完成时亦可表示状态的延续.