since 与after 在用法上的区别
问题描述：
since 与after 在用法上的区别
请给予相关例子,
答
since.一般指一个时间段,是完成时的标志.e.g.she had stayed at the bed since she was sent to hospitalafter ...一般指一个时间点,一般用过去时.e.g.he rushed out from the classroom after the bell rang...