DEGREES  OF  COMPARISON
Different degree forms
This subject is related to
adjectives and adverbs.
Comparison is of three types 
1] Positive Degree           
                     2] Comparative Degree         
                                            3] Superlative Degree
We  should not use double superlative degree in a
given sentence.
I   -   
-er     -est
Broad          broader        broadest             bold    bolder            boldest
Similarly for      clever, few, grand, high,  light, poor, rich, short, sweet, tall, weak,
hard, kind, near, quick, small, soft, strong, thick, old, 
II   -   
-r     -st
Able – abler – ablest      
similarly      fine, large, wide, brave, grave, noble,
wise
III     -y    
-ier     -iest         
Balmy – balmier – balmiest                     
similarly     busy, dry, dirty, easy, happy, heavy,
holy, merry, pretty, wealthy, 
IV     -   
-[double the last letter]er,    -[double the last letter]est
Big – bigger – biggest 
Similarly    cruel, fat, hot, red, sad, thin, wet, 
V     all the three forms are different
Bad – worse – worst                 ill – worse – worst                    Evil – worse – worst
good – better – best                  Little – less – least                    much – more – most 
Many – more – most                old – elder – eldest                   In – inner – innermost
up – upper – uppermost           Out – outer – outermost         far – farther – farthermost
VI     with prefixes
Beautiful – more
beautiful – most beautiful
Similarly    courageous, difficult, famous, industrious,
honourable, handsome, quickly, quietly, slowly
VII     two types
Clever – cleverer –
cleverest   /   clever – more clever – most clever
Similarly    early, costly, shameful, interesting,
important, rude, attractive, pleasant     
+DEGREES  OF  COMPARISON – Models
Model      I
In this model of whom
you speak is number one [No, 1] in the world and the rest all in another side.
P. D.            no other                                  so/as…..as
C. D.            than any
other
S. D.            of all
1] Einstein / great / scientist                    2] Everest / high / peak
3] Pacific / large / ocean                                        4] Virus
/ small / living thing
5] Discovery / fast / plane                          6] Sahara / large /
desert
Model      II
In this model the
subject is one of the great one, and the rest of the rest of the world in
another side.
P. D.            very few                                   so/as…..as
C. D.            than most
other
S. D.            one of the
1] Akbar / greatest / king                          2] AP / Large / state
3] Kanchena Ganga / high / peak            4] Stalin / famous / politician
5] Earth / big / planet                                 6] Gold /
costly / metal
Model      III
In this one the
comparison from the lower side.
P. D.            some
…..,      at least           as…..as
C. D.            not than some
other
S. D.            not of all
1] Golkonda / fast / river                           2] Kerala / large /
state
3] Banana / tall / tree                                4] Iron / costly
/ metal
5] Cauvery / long / river                                        6]
Eenadu / popular / news paper
Model      IV
In this one the
comparison is between two.
If there is “not” in P. D. 
it won’t appear in C. D.
If there is “not” in C. D.  it won’t appear in P. D.
In this model the comparison is between two objects. So there won’t
be S. D.  
1] Pen is mightier than sword.                 2] Kakinada is not as large as
Vizag
3] The tiger is as ferocious as
the lion.   4] coconut tree is as tall as
dates tree.