1) Help yourself to the fish.
请吃点鱼。
2) Eat a little fish, please.
请吃一点鱼。
3) Help yourself to this fish.
请吃鱼
4) Help yourself to some candy.
请吃点糖。
5) Please help yourself to some more meat.
请再吃点肉。
6) Please have something to eat.
请吃点东西。
参考词条