看什么情况了,是你自己找不到,还是别人找不到,还是某个东西找不到
I scribbled down his telephone number on a piece of paper,but now I can't find it.
我把他的电话号码胡乱记在—张纸上；可现在找不到了.
It's a funny thing,but she put the book on the table five minutes ago,and now it can't be found.
真是怪,她五分钟前才把书放在桌子上,现在却找不到了.