Go ahead, help yourself. Take whatever you want. 来，不要介意。想吃什么就吃什么。

　　Help yourself to the cake. 多尝尝蛋糕。

　　Help yourself to whatever's in the fridge. 冰箱里的东西想拿什么就拿什么。

　　I feel like drinking a cold beer.  我想喝一杯冰的啤酒。

　　There are a few in the fridge. Help yourself.  冰箱里有几瓶，随便拿。