第一组的英文

the first place of/in the first group

I am in the first group我在第一组

你可以用group来表示大组，用team来表示小组。因为从语境上来说，team是一群有共同目标的，而group目标性淡一些。你可以这样介绍：In this game, we will divide you guys into three groups.Within the group, you will be further put into small teams. There are three teams in each group.