Contents introduction chapter I grammatical meaning, grammatical form

Conclusion
Each of the using of modal functions helps to be clear our speak, express a variety of moods or attitudes towards a possible state or action. Using modals in oral or written language is easy to describe what we say or think about something and it will clear to listener to understand your mind what are you going to tell or how are you going to show your mood? And your speech will be more beautiful or stronger then other simple speech.
Pupils come to school with many of their habits of expression already formed on bad models, so they must give some attention to the special work of pointing out common errors of speech. That's why we must use grammar rules in correct ways not only in written language, but also in oral language.
I learnt fully about modal verbs over my course work. I understand that modal verbs are special verbs which behave very differently from normal verbs. And they generally express speakers' attitudes. Modal verbs are not used independently in the English language; they follow main verbs to give extra sense.
We can see that the English use some modal verbs to express their general attitudes, moods, or other relationship with someone else. And I also knew which modal verbs express obligation, necessity, and others. In addition, I learnt their primary and secondary functions, how to use them.
It is the firs time in my life I have attempted to write course work. I have tried to create a work that will be an easy to use. I also hope that it will be prove to be a reliable and indispensable companion to anyone who interested in the English language.
The list of used literature.
1. Palmer, F. R.,Mood and Modality, Cambridge Univ. Press, second edition,
2001.

2. 
   A Linguistic Study of the English Verb, Longmans, 1965.
   
3. 
   Warner, Anthony R., English Auxiliaries, Cambridge Univ. Press, 1993
   

4. 
   Gamer, Bryan A. (2003). Gamer's Modern American Usage. Oxford University Press, p. 810. ISBN 978-0-19-516191-5. Butterfield, eds. (2015).
   
5. 
   Fowler's Dictionary of Modern English Usage (4th ed.). Oxford University Press, p. 853. ISBN 978-0- 199-66135-0.
   
6. 
   Quirk, Randolph; Greenbaum, Sidney; Leech, Geoffrey; Svartvik, Jan (1985). A Comprehensive Grammar of the English Language. Harlow: Longman, p. 140. ISBN 978-0-582-51734-9.
   
7. 
   Merriam-Webster's Concise Dictionary of English Usage. Merriam-Webster. 2002. pp. 760-761.ISBN 978-0-87779-633-6.
   

8. 
   Fleischman, Suzanne, The Future in Thought and Action, Cambridge Univ. Press, 1982, pp. 86-97.
   
9. 
   Comrie, Bernard, Tense, Cambridge Univ. Press, 1985, pp. 21, 47-48. "UltraLingua Online Dictionary & Grammar.
   

10. Oxford Practice Grammar (Advanced), George Yule, Oxford University
Press ISBN 9780194327541 Page:40

11. 
    Kenneth G. Wilson, "Double Modal Auxiliaries", The Columbia Guide to Standard American English, 1993.
    
12. 
    David Rubin, "might could (double modal)", The Mavens' Word of the Day, Random House, November 20, 2000.