Hi Mubashir we can definitely help you but as you can see above we need more information.
Also for us to help you, you will need some basic tools like a flat head and a phillips screwdriver a basic socket set, maybe some pliers and a willingness to take the generator apart.
If you're not comfortable with that then there are only a few options.
Take it to somebody who can fix it. (small engine or even a lawn mower repair shop) or a Honda dealer. These small generators are very susceptible to the carburetor getting gummed up if the generator sits unused for a few weeks.
Once you get it fixed and running you need to either drain the carburetor when the generator is going to sit; Or you need to add a gasoline stabilizer or Seafoam to the fuel tank and run the generator for about 5 minutes to circulate it through.
Here's a link to what is involved on a EU2000i Honda. Not the same but probably similar enough to give you an idea what is involved in cleaning out the gummed up carburetor.
Link
And a different link on draining the fuel bowl and adding Seafoam
Link 2