certain 和 sure的区别

sure certain的区别 be sure of和make sure of还有make certain of和be certain of的区别? certain和sure有什么区别 indeed 与certain sure的区别 I'm sure to……和I'm certain to……的区别 be certain to do 和be sure to do 的区别 高一英语改错+sure 和certain区别 半助动词 be certain to be sure to 的区别 sure ,for certain 与certainly的具体区别 单词 positive,sure,definite,certain,的词性?区别?用法 certain 与 sure 的用法 make certain of和be certain of的区别?