这里有三支钢笔和两只铅笔和一个尺子，用英语怎么说？

英语是：There are three pens, two pencils and a ruler.

句子解释：
three 英[θri:] 美[θri]
num. 三; 三个; 第三（章，页等）;
n. 三岁; 三个人[东西]; 三，三个;
adj. 三的; 三个的;
[例句]We waited three months before going back to see the specialist.
我们等了3个月才回去见那位专家。

pencil 英[ˈpensl] 美[ˈpɛnsəl]
n. 铅笔，彩色铅笔; 笔状物; 画风，画法; [物] 光线锥;
vt. 用铅笔写; 用画笔画;
[例句]I found a pencil and some blank paper in her desk
我在她的桌子里找到一支铅笔和几张白纸。

ruler 英[ˈru:lə(r)] 美[ˈrulɚ]
n. 统治者; 尺; 直尺;
[例句]He was a weak-willed and indecisive ruler.
他是一位意志薄弱、优柔寡断的统治者。

These are three pens,two pencils and a ruler.

There are three pens, two pencils and a ruler.

There are three pens, two pencils and a ruler

this have three pens two pencil and a ruler