eat 和have 都可以表示“吃”,但是have意思更加廣泛,可以表示“有,從事,允許,喝”等含義.
1.eat作“吃”解時(shí),一般是指吃固體食物.
We eat rice every day.我們每天吃米飯.
They eat a lot of / often eat potatoes.
She likes eating dumplings.
eat也可用“喝”解,后多接soup（湯）.強(qiáng)調(diào)動(dòng)作,多用于美國英語中.
2.have作“吃”解時(shí),主要用于一日三餐（breakfast,lunch,supper）之前,或與meal連用.
We often have lunch at school.
have用在口語中表示請(qǐng)求或邀請(qǐng)的句子里,也可表示“喝”.
Would you like to have a glass of milk?你想喝杯牛奶嗎?
Let’s have a drink of tea.咱們?nèi)ズ赛c(diǎn)茶吧.