1.表示“吃”一日三餐时，常用have。
After I had a meal, I turned on TV.

2.表示“吃”水果、肉、鱼等，常用eat。
The boy is eating an apple.
有时eat单独使用或后接“饭”“餐”之类名词，也可表示吃饭、喝汤。
Eat up your dinner.

3.表示“吃”药时，常用take。有时take也可表示“吃饭”“喝茶”。
The medicine is to be taken three times a day.
Would you take a cup of tea?
We’ll take dinner about six.

4.表示“吃”某种液体之类的物质时，常用drink。
My friends drinks Coca-cola like fish.

5.表示请人别客气，随便吃用help oneself to

6.表示“吃”败仗、“吃”亏时，常用suffer。
He suffered great loss for he was cheated.