be sure about doing的意思?

be sure about doing的意思? be sure about 和be sure of的区别 be sure of 与 be sure about 的区别, be sure of /about doing sth和be sorry for about 有没有这些用法? sure的用法be sure of doing和 be sure to do有什么区别呀? be sure about sb be sure to do和be sure of doing 的区别be sure to do和be sure of doing的意义有什么不同 make sure of be sure about be sure of 的区别和意思 be sure to do sth和be sure of doing sth的区别 be sure of doing sth和make sure of doing sth有区别吗?请详解make sure和be sure的用法, make sure to do sth、be sure of sth、be sure that 、be certain of/about的区别 两个词组的区别be sure of 以及be sure about有什么区别呢? be sure of sth.与 be sure about 区别? be curious about doing造句 be wild about doing sth be excited about doing sth be about doing 和 be about to do的区别和用法! Make sure和Be sure about 怎么区分具体一点