more useful, the most useful
Most useful and more useful.
The comparative form of "useful" is "more useful."
Comparative: more useful Superlative: most useful
Computers are so useful to us.Bert is not a very useful person.I find that the phone is a useful invention.Make yourself useful and pass me the spanner.Hopefully these sentences are useful to you.
how are mirrors useful ? how are mirrors useful ?
more useful, most useful
more useful and most useful
is nuclear deal useful for us? why nuclear deal is useful for us? is nuclear deal useful for us? why nuclear deal is useful for us? is nuclear deal useful for us? why nuclear deal is useful for us? is nuclear deal useful for us? why nuclear deal is useful for us?
useful
Extremely useful
its not useful for the refrigerator its useful for humans only....