求英语语法高人解释~~

N-UNCOUNT
If there is word of something, people receive news or information about it. 消息; 信息
表示/消息/时零冠词,就是本句中的用法,不可数...

表示/话/时才是可数名词
N-PLURAL
Someone's words are what they say or write. 话
I was devastated when her words came true.
她的话应验时，我感到震惊。
N-SING
If you have a word with someone, you have a short conversation with them. 简短的交谈
I think it's time you had a word with him.
我认为该是你和他谈一谈的时候了。
N-COUNT If you offer someone aword of something such as warning, advice, or praise, you warn, advise, or praise them. (警告、建议、赞扬等的) 话语
A word of warning. Don't stick too precisely to what it says in the book.
一句警告的话。不要对书上所说的抠得太死。

因为word在此的意思是“news”,news是不可数名词，word在此也是不可数名词。

word不可数时表示话
words可数时是指词，单词或词组

同意楼上两位的，跟句子单复数没有关系，是词义的不同而已