1楼：匿名用户
now, do you understand how should do？
2楼：我总是bu懂
个人认为把now放在后面比较好。
3楼：玉树临风俏鲁尼
now,you know how to do it?
4楼：起蝶飞舞
now,you underdtand how can you do it?
5楼：sg流年似水
do you know how to do it now?
6楼：朝如青丝
now, do you understand what to do ?
7楼：匿名用户
now,do you understand what is supposed to do?