1. I´ve just had a cup, thank you.
    我刚喝了一杯，谢谢。

2. I´ll bring you a cup of tea.
    我来给你拿杯茶喝。

3. I had a plate with a cup of tea and a piece of cake.
    我也拿着一个盘子，盘子上也是一杯茶和一块蛋糕。