我丢一支铅笔英语

Because i lost my pencel .. 这就是句子。 如果要加在某句里面，就把首字母B改成小写就可以了。

I lost a black and white pencil case in the library this morning

My pen is lost.

你好，很高兴回答你的问题，正确答案为：I lost my pen.或My pen was lost.**************************************************************************^__^真心祝你学习进步，如果你对这个答案有什么疑问，请追问，另外如果你觉得我的回答对你有所帮助，请千万别忘记采纳哟！**************************************************************************

Hello everybody! I am Jim from Grade 7 Class 14. Just now I lost a pencil. Would you please contact me when you see it? Thank you.