With hammer-ons and pull-offs you might find things like these :
E----------------------------------------------------------------
B----------------------------------------------------------------
G----------------------------------------------------------------
D----------------------------------------------------------------
A---------5h7-----------5h7--------------------------------------
E---0--0----------0--0-------------------------------------------
which would mean play the open E twice, then hit the A string at the
5th fret and hammer on to the 7th fret.
Pull offs look very similar :
E----3p0------------------------------------------------------------
B---------3p0-------------------------------------------------------
G--------------2p0--------------------------------------------------
D-------------------2---------------------------------------------
A----------------------------------------------------------------
E----------------------------------------------------------------
i copied the above from
http://www.freesheetmusic.net/guitartablature.html
tablatures are very personal, so others might do it differently.
i hope this helps
-mike123