In lunch box we can put lunch,
but in school bag can we put school?

If you study in Engineering college you can become engineer,
Whereas if u study in Presidency college will u become Presdient???

If you stand near Bus stop you will get bus, whereas if you stand near
the Full Stop will u get a FULL?

If you go in a cycle it is cycling, when you go in a train will it become a Trainining??

In the fishing net we can catch the fish, whereas are we catching Mosquitoes using mosquito net??