at first time 和for the first time 有什么区别

the first time 和at the first time和for the first time的区别 for the first time和the first time和at the first time有什么区别? 求in the first time和at the first time 、for the first time的区别~ at the first time和for the first time有什么区别 区分一下for the first time 和at the first time 的区别, at first time 和for the first time 有什么区别 at the first time和for the first time的区别 用for.the.first.time和at.first 和it.was.the.first.time和the.first.time各造一个句子,说明她们的区别 first of all,first,at first,for the first time,the first time有什么区别 at the first time t与he first at the first time t与he first time区别? the first time/at the first time/ for the first time at the first time 与for the first time 与in the first time的区别 At the first time、The first time、For the first time 、On the first time的区别 at first 和at first time的区别 for the first time 和the first time造句,急 It's the first time ,for the first time ,the first time ,at first 区别?哪个后面加过去时态 for the first time,first time,the first time和by the first time的具体用法和怎样区别? on the first time ;in the first time; at the first time; for the first time以上词组都存在么区别是?