grass既是可数名词也是不可数名词，grass意思是禾本科植物的时候一般用作可数名词；意为草、青草、草地、牧场的时候一般用作不可数名词。grass还可作动词，意为用草覆盖；使……长满草；使……吃草；长草；放牧等。例句：She spread our lunch on the grass她在草地上摆好了我们的午饭。

grass的第三人称单数是grasses，复数是grasses，现在分词是grassing，过去式是grassed，过去分词是grassed。

grass用作名词的用法例句：

1、The grass was wet with dew草被露水打湿了。

2、Father was cutting the grass，and meanwhile mother was planting roses父亲在剪草，母亲在种玫瑰。

3、We play football on the grass我们在草地上踢足球。

4、I let the horse drop his head to crop the spring grass我让马低下头啃吃春天的青草。

5、The windows overlooked a lawn of tall waving grass窗户外边是一块草地，高高的草随风摇摆。

6、Mr Zuma had a solid reputation as a grass roots organiser作为一个民众的组织者，祖玛先生名声甚佳。