I am not sure的用法有几种越多越好大家快来啊

I am not sure的用法有几种越多越好大家快来啊 I am not sure是什么意思 Er...i am not sure. l am sure的用法 I'm sure I am not wrong perhaps与may的用法perhaps he telephoned last night,but i am not sure.=he may have telephoned last night,but i am not sure.我想问perhaps里没有have 为什么may 里要加have. i am not sure反义疑问句 I am not sure what your talking 翻译成中文：I am not sure i am not sure 什么意思 I am not sure同义句 maybe.but I am not sure. Sure.I am not a bad I AM NOT SURE YET?什么意思? I am not sure.that I am gay I am not sure what else to I am not sure what else to say. I am not sure yet同义句I am not sure yet=? may be,I am not sure还是maybe,I am not sure?