Hi, first thing to check is your clutch reservoir,it's next to your brake master cylinder,if low or about empty,then your clutch slxve cylinder is bad,leaking and not holding pressure,here's a few links to look at,the job is real easy to do,you can have someone help or you can do it by yourself,you will need a bleeder kit,Autozone has them for about 8 nbucks and a container of brake fluid,yes brake fliud,no clutch fluid.
Repair Guides Clutch Slave Cylinder AutoZone com Here's where the reservoir is at.
Repair Guides Clutch Master Cylinder AutoZone com ,you can join Autozone's site,it's free,then you can use their repair guides like me,need more help,let me know,also is free.