BASIC MISTAKES  

1. Other, others, the other or another?

Have a look at the grammar point :

http://www.grammar.cl/english/another-other-others.htm

http://dictionary.cambridge.org/grammar/british-grammar/other-others-the-other-or-another

 Exercises:

http://www.grammar.cl/english-games/another-other-others.htm

http://www.learn-english-today.com/lessons/lesson_contents/exercises/other-another_gapfill1.htm

http://english-zone.com/members/grammar/st-chang.html

 2. Somebody, everybody, anybody,  nobody...................?

I may be wrong, but I think some of you still have problems with the combinations some,any,no,every+body, thing...... To try to solve these problems,have a look at the grammar point first and then do the exercises.. Always remember  that these combinations ARE  SINGULAR .

How to use these compounds:

http://www.edufind.com/english/grammar/Determiners7d.cfm
Common Mistakes
http://ww2.college-em.qc.ca/prof/epritchard/sometmts.htm

Exercises :

1. http://perso.wanadoo.es/autoenglish/gr.anythin.i.htm
2. http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-2591.php
3. http://www.englisch-hilfen.de/en/exercises/confusing_words/something_anything.htm 
4. http://www.usingenglish.com/quizzes/70.html

3. ODA SCOMP  ORDER OF ADJECTIVES AND COMPARISONS....... 

 Have a look at the order :
http://www.grammar-quizzes.com/adj_order.html 

Exercises : 
http://perso.wanadoo.es/autoenglish/gr.adwo.p.htm 

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-42493.php