如何区分first,firsly,at first

如何区分first,firsly,at first 怎么区分the first,the first of all ,first of all ,at the first,to start with 区分一下for the first time 和at the first time 的区别, 如何区分at weekend 与 on weekend in on at the如何区分 如何区分top和first ,前三名如何用英语讲? 有谁能准确区分以下意思,顺便举例.一直搞不清楚:at the first time .the first time .at the first .for the first time .at first .的意思.知道的请解说下并举例. above,at ,behind ,below ,beside ,between,in ,如何区分 如何区分be good at / be good with 如何区分be good at / be good with at first 与 first 区分-Could I play games?-Yes.But ( ) you have to finish your homework.A.first B.next C.finally D.at first谁能告诉我为什么选A不选D 用 at first 造句at first 首先 in the school ,at the school ,in school 和at school 这几个短语如何区分? first of all first the first at first的区别 at the first,at first与first的区别 love at first at the first crossing 用at first造句