如何将抽取的文本复制到VI命令提示符

I want to know if there is any way by which I can paste yanked text to the command window. For eg. if I have yanked a word and I want to grep it in some location I cant simply paste the word using 'p'. However if I copy it to clipboard, Shift-Insert will paste the same thing. I want to know if there is any way by which I c