Dear Roba,
First check this (The Art of Assembly Language Programming)...
http://cs.smith.edu/~thiebaut/ArtOfAssembly/artofasm.html
&
http://www.tutorialspoint.com/assembly_programming/index.htm
One tutorial I really like is the PC Assembly Tutorial
http://www.drpaulcarter.com/pcasm/
The zipper PDF can be found here: http://www.drpaulcarter.com/pcasm/pcasm-book-pdf.zip
Until you create and run a simple program, and debug it, it will be difficult to understand assembly.
Regards,
Hany Sewilam AbdelHamid
Business Development Manager