advice既可以做不可数名词，也可以做可数名词。
当它的意思是忠告或者劝告时，它是抽象名词，也是不可数名词，当它用在商业上，表示公函以及通知的时候它就是可数名词，并且常用复数。
advice解析如下：
一、单词读音：
英式发音：[ədˈvaɪs]
美式发音： [ədˈvaɪs]
二、单词释义：
n. 建议; 意见; 忠告; 劝告
三、词形变化：
复数：advices
四、词语搭配：
take one's advice 接受某人的建议
give advice 建议某人做某事
ask for advice 求助于某人，征求意见
seek advice 求询意见
a piece of advice 一条建议
五、单词用法：
advise常用于告知某人某个建议或想法，后面常接名词或代词作宾语。例如：I have some advice for you about how to improve your study habits（我有一些建议，可以帮助你改善学习习惯。）
advise sb (not) to do sth 劝告某人（不）做某事。例如：I advised him not to drive so fast in bad weather（我劝告他不要在恶劣天气下开得太快。）
advise后接从句时，从句谓语要用虚拟语气，should+动词原形。例如：I advise that you (should) take more exercise to build up your strength（我建议你多锻炼以增强体质。）
advise可以与介词on连用，表示“向某人征求意见”。例如：I will go and ask my parents for their advice on what to do next（我会去征求父母的意见，看看下一步该怎么做。）
advise sb against doing sth 劝告某人不做某事。例如：I advised him against smoking because it is harmful to one's health（我劝他不要吸烟，因为吸烟有害健康。）
六、双语例句：
Tell me the reason (why) he refused to listen to my advice.
告诉我为何他拒绝听从我的劝告。
He disregarded his doctor's advice.
他无视医生的劝告。
I set a high value on his advice.
我认为他的忠告很有价值。
I asked the teacher for her advice.
我征求这位老师的意见。
Don't place too much reliance on his advice.
别太相信他的意见。