greenbeans是可数名词。
I ' ll have eggplants , mashed potatoes and green beans我要茄子、土豆泥和青豆。
I also have carrots , green beans and cabbage growing我也种了萝卜,绿豆还有花椰菜
You have a choice of vegetables , green beans , or spinach你可以选择蔬菜:青碗豆或菠菜。 
Can i get you another spoonful of fried shrimps with green beans我再给你一调羹青豆虾仁好吗