谓语动词复数是动词后面加s或es吗？
不是。
一般来说，不可数名词用动词单数，可数名词复数用动词复数。
There is much water in the thermos. 热水瓶里有很多水。
但当不可数名词前有表示数量的复数名词时，谓语动词用复数形式。
e.g. Ten thousand tons of coal were produced last year. 去年生产了一万吨煤。
Large quantities of water are needed. 需要大量的水。
Large amounts of money are enough. 大量的钱就足够了。
In western countries, mountains of rubbish are thrown away each day. 在西方国家，每天都有堆积如山的垃圾被扔掉。
扩展资料：
并列结构作主语时谓语用复数。
Reading and writing are very important. 阅读和写作是非常重要的。
注意： 当主语由and连结时，如果它表示一个单一的概念，即指同一人或同一物时，谓语动词用单数，and 此时连接的两个词前只有一个冠词。
The iron and steel industry is very important to our life. 钢铁工业对我们的生活非常重要。
如果以what从句作主语，表语又是单数，主句的谓语动词一般用单数；如果表语是复数，主句的谓语动词一般用复数。
What caused the accident is a complete mystery. 造成事故的原因完全是个谜。
What his father left him are a few English books. 他父亲留给他的只有几本英语书。
参考资料来源：百度百科-谓语动词
