grass与grasses的区别：含义不同、用法不同。grass可作名词和不及物动词，基本含义有“青草、草地、牧场、告发”；而grasses是grass的第三人称单数和复数形式，作“禾本科植物”解时多用作可数名词。
grass的中文含义及用法介绍
1、作为名词时，意为草;青草;牧草;禾本科植物;草地;草坪;草场;牧场。复数形式为grasses。
例句：The dry grass caught fire.
干草着火了。
Don't walk on the grass .
勿践踏草地。
Small things stirred in the grass around the tent...
一些小东西在帐篷四周的草丛里窸窸窣窣地动着。
I started smoking grass when I was about sixteen.
我大约16岁的时候开始吸大麻。
The plant resembles grass in appearance.
这种植物的外形像草。
The forage grass disease is a complex and big system.
宁夏牧草病害是一个复杂大系统。
Some grasses furnish us with food.
有些禾本科植物供给我们食物。
He lay back on the grass using his backpack as a pillow.
他用背袋当枕头仰卧在草地上。
With one accord they turned and walked back over the grass.
他们步调一致地转身走过草坪。
2、作为不及物动词时，意为(向警方)告密，告发。
例句：His wife wants him to grass on the members of his own gang...
妻子要他向警方告发他所在团伙的成员。
He was once a professional grass.
他曾是一个靠告密为业的人。
You wouldn't grass up an old mate, would you?
你不会告发老朋友的，对吗？
He was to loyal to grass on his own brother.
他很忠诚，不会告发他的亲兄弟。
