Sounds like it needs a new washer.
www.diydata.com
In the search box top right type in the following.
how to replace a tap washer
Then click search.
Find the following near bottom of page.
Cure a leaking tap - replace the washer
click on it and it will give you all you need to know picture by picture.
But don't forget to turn off the water to the tap/s first. Once you have done one you'll be able to do any tap that leaks.
I appologize for the following if it offends.
While on net order a Your language to English dictionary it would help immensly with your English. I use a French English dictionary when on holdiay.
Bob, June 2009
