初级下 81-148，共70课，每天4课，预计18天。现已拖延一天，day1&2为一天学习内容，预计增加一天，19天。
lesson81
- die of 因为XX病死去
pass away过世 - try doing sth 试着做。。。If this way doesn't work,you may try calling her.
try to do sth 设法做。。。When I get there,I'll try to call you back. - He has been to beijing several times.
quit 三态相同 - couldn't stop doing
couldn't resist doing
can't help doing - It is no use doing
