grass的复数形式是grasses。grass的意思：n.草，青草，草地，草坪，告密者，龙须菜；vt.用草覆盖，使…长满草，使…吃草；vi.渐渐被草覆盖，放牧；过去式:grassed；现在分词：grassing；过去分词：grassed。

The grass in the park is green and lush.（公园里的草又绿又茂盛。）

The cows were grazing peacefully on the grassy field.（奶牛在草地上安静地吃草。）

After the rain,the droplets glistened on the blades of grass.（雨后，草叶上的水珠闪闪发光。）

come to grass：走出矿井外

cut one's own grass：自食其力

cut the grass from under sb.'s feet：妨碍[挫败]某人；拆某人的台

go to grass：去放牧；休息；退休；被埋葬；被打倒在地；滚开!

hear the grass grow：特别敏锐