advice为不可数名词，没有单复数可言。如果要表达一条建议，应该是：a piece of advice，以此类推，两条建议就应该是：two pieces of advice。

advice作名词

advice(on sth)

劝告；忠告；建议；意见

an opinion or a suggestion about what sb should do in a particular situation

advice on road safety

有关道路安全的建议

They give advice for people with HIV and AIDS.

他们向艾滋病病毒携带者和艾滋病患者提供咨询。

Follow your doctor's advice。

要遵从医嘱。

We were advised to seek legal advice。

有人劝我们找律师咨询。

Let me give you a piece of advice。

让我给你一个忠告。

A word of advice. Don't wear that dress.

一句忠告：别穿那件连衣裙。

Take my advice. Don't do it.

听我的劝告，别干这事。

I chose it on his advice。

我这是照他的建议选择的。

advice和advise的区别

advice名词不可数，可以用a piece of advice

advise 动词 advise doing sth advice 是不可数名词，常用a piece of advice，一条建议advise是动词，常用advise sb to do sth.建议某人做某事。其实好记的，c和希读音相似。可记成希望成为名人。即含有c的是名词。另外的就是动词。