The main verb is also called the lexical verb or the principal verb. This term refers to the important verb in the sentence, the one that typically shows the action or state of being of the subject

THE LIST OF USED DICTIONARIES

1.Axmanova O.S. Dictionary of linguistic terms. – М., 1960.

2.Macmillan Dictionary. Macmillan Education Limited 2009. P.638.
3.Merriam Webster’s Advanced LEARNER’S English Dictionary. – Springfield Massachusetts, USA, 2008. P.2032.
4.Longman Dictionary of Contemporary English (LDCE). –Edinburgh Gate, England, 2007. P.1949


THE LIST OF USED ONLINE SOURCES

1. 
   http://encyclopedia2.thefreedictionary.com/Comparative-Historical+Linguistics
   
2. 
   https://www.researchgate.net/publication/342702507
   
3. 
   The processing of bilingual (switched) compound verbs: Competition of words from different categories for lexical selection | Bilingualism: Language and Cognition | Cambridge Core
   
4. 
   (pdf) modeling analitic forms of verb in uzbek as stage of morphological analysis in machine translation (researchgate.net)
   

1^Robert Stockwell History and Structure’’; Charles Dickens “A Christmas Carol”; Jean Boase “Stylistics and Translation”, Xajiyev S.K. Linguistic occurrences connected with word transference meaning”; Mengliyev B “O’zbek tilidan universal qo’llanma”; Xoliyorov O’.

2^ Robert I. Binnick, Time and the verb: a guide to tense and aspect. Oxford University Press US,2011,pp. 135–6

3^ Robert I. Binnick, Time and the verb: a guide to tense and aspect. Oxford University Press US,2011,pp. 135–6.

4^ Allerton D.J. Essentials of Grammatical Theory. Routledge,1979,p.34.

5^ Croft William. Typology and Universals. Cambridge UNI Press, 2003.

6^ Croft William. Typology and Universals. Cambridge UNI Press, 2003.

7^ Yusupov U.K. Contrastive linguistics of the English and Uzbek languages. Tashkent, 2013

8^ Robert I. Binnick (1991). Time and the verb: a guide to tense and aspect. Oxford University Press US. pp. 135–6.

9^ Robert I. Binnick (1991). Time and the verb: a guide to tense and aspect. Oxford University Press US. pp. 135–6.

10^ Van olphen, herman . Aspect, Tense, and Mood in the Hindi Verb-Indo-Iranian Journal, 1975.

11^ MacDonald, Jonathan Eric. The Syntax of Inner Aspect.-Stony Brook University. 2006,p-1.

12^ Van Olphen, Herman. Aspect, Tense, and Mood in the Hindi Verb-Indo-Iranian Journal,1975.

13^ Li, Charles, and Sandra Thompson .Aspect.Mandarin Chinese: A Functional Reference Grammar. Los Angeles: University of California Press,1981, pp. 184–237.

14^ Gabriele, Alison (2008). "Transfer and Transition in the L2 Acquisition of Aspect". Studies in Second Language Acquisition:

15^ Li, Charles, and Sandra Thompson. Aspect. Mandarin Chinese: A Functional Reference Grammar. Los Angeles: University of California Press,1981, pp. 184–237.

16^ Van olphen, herman .Aspect, Tense, and Mood in the Hindi Verb. Indo-Iranian Journal, 1975.

17^ Li, Charles, and Sandra Thompson .Aspect Mandarin Chinese: A Functional Reference Grammar. Los Angeles: University of California Press,1981, pp. 184–237.

18^ Gabriele, Alison. Transfer and Transition in the L2 Acquisition of Aspect-Studies in Second Language Acquisition,2008.

19^ Li, Charles, and Sandra Thompson . Aspect. Mandarin Chinese: A Functional Reference Grammar. Los Angeles: University of California Press,1981,pp. 184–237.