B. Aarts, Syntactic Gradience: The Nature of Grammatical Indeterminacy, Conversational impliciture. Mind Lang, pp.124-162, 1994.

K. Bach, Semantic slack Foundations of Speech Act Theory: Philosophical and Linguistic Perspectives, Routledge, pp.268-291, 1994.

K. Bach, Regressions in pragmatics (and semantics), Pragmatics. Palgrave Macmillan, pp.24-44, 2007.

K. Bach, Odds & Ends (Loose/Deep/dead)Available from: http://userwww.sfsu, 2013.

B. Gardó-n and J. Luis, Los verbos modales ingleses. Estudio semántico-pragmático, 1996.

B. Gardó-n and J. Luis, Relevance and modality, Rev. Alicant. Estud. Ingl, vol.11, pp.3-22, 1998.

R. Boogaart, Semantics and pragmatics in construction grammar, Contexts and Constructions. John Benjamins, pp.213-241, 2008.
DOI : 10.1075/cal.9.09boo

M. Carretero, Explorations of the use of English will/be going to contrasted with the Spanish future indicative ir a, English Modality in Perspective. Peter Lang, Frankfurt-am-Main, pp.205-230, 2004.

R. Carston, The semantics/pragmatics distinction: a view from Relevance Theory The Semantics/Pragmatics Interface From Different Points of View, pp.85-125, 1999.

R. Carston, The Explicit/Implicit Distinction in Pragmatics and the Limits of Explicit Communication, International Review of Pragmatics, vol.1, issue.1, pp.35-62, 2009.
DOI : 10.1163/187731009X455839

R. Carston, Explicit communication and 'free' pragmatic enrichment Explicit Communication: Robyn Carston's Pragmatics, pp.217-287, 2010.
DOI : 10.1057/9780230292352_14

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

J. Coates, The Semantics of the Modal Auxiliaries, 1983.

P. Collins, Modals and Quasi-modals in English. Rodopi, 2009.
DOI : 10.1163/9789042029095

A. D. Cruse, Aspects of the micro-structure of word meanings, Polysemy: Theoretical and Computational Approaches, pp.30-51, 2002.

R. Declerck, A Comprehensive Descriptive Grammar of English, 1991.

I. Depraetere, Some observations on the meaning of modals, Distinctions in English Grammar, Offered to Renaat Declerck. Kaitakusha, pp.72-91, 2010.
URL : https://hal.archives-ouvertes.fr/halshs-00849480

I. Depraetere and C. Langford, Advanced English Grammar --A Linguistic Approach, Continuum, 2012.
URL : https://hal.archives-ouvertes.fr/halshs-00720756

I. Depraetere and S. Reed, Mood and modality in English The Handbook of English Linguistics, pp.269-290, 2006.

I. Depraetere and S. Reed, Towards a more explicit taxonomy of root possibility in English, Engl. Lang. Linguist, vol.151, pp.1-29, 2011.
URL : https://hal.archives-ouvertes.fr/halshs-00625743

I. Depraetere and A. Verhulst, Source of modality: a reassessment, English Language and Linguistics, vol.35, issue.01, pp.1-25, 2008.
DOI : 10.2307/455712

URL : https://hal.archives-ouvertes.fr/halshs-00347343

G. L. Dunbar, Towards a cognitive analysis of polysemy, ambiguity, and vagueness, Cognitive Linguistics, vol.12, issue.1, pp.1-14, 2001.
DOI : 10.1515/cogl.12.1.1

M. Ehrman, THE MEANING OF THE MODALS IN PRESENT-DAY AMERICAN ENGLISH, Linguistics, vol.4, issue.28, 1966.
DOI : 10.1515/ling.1966.4.28.46

R. Facchinetti, Can and could in contemporary British English: a study of the ICEGB corpus, New Frontiers of Corpus Research. Papers from the Twenty-first International Conference on English Language Research on Computerized Corpora, pp.229-246, 2000.
DOI : 10.1163/9789004334113_016

D. Geeraerts, Vagueness's puzzles, polysemy's vagaries, Cognitive Linguistics, vol.4, issue.3, pp.223-272, 1993.
DOI : 10.1515/cogl.1993.4.3.223

B. S. Gillon, Ambiguity, generality, and indeterminacy: Tests and definitions, Synthese, vol.17, issue.3, pp.391-416, 1990.
DOI : 10.1080/00455091.1987.10715909

N. Gisborne, Dynamic modality Available from: http://www.skase.sk, SKASE J. Theor. Linguist, vol.42, pp.44-61, 2007.

H. Grice and . Paul, Logic and conversation, Syntax and Semantics, pp.41-58, 1975.

M. Groefsema, ???Can you pass the salt????: A short-circuited implicature?, Lingua, vol.87, issue.1-2, pp.103-135, 1992.
DOI : 10.1016/0024-3841(92)90028-H

M. Groefsema, Can, may, must and should: A Relevance theoretic account, Journal of Linguistics, vol.266, issue.01, pp.53-79, 1995.
DOI : 10.1007/BF00353453

R. Huddleston, . Pullum, and . Geoffrey, The Cambridge Grammar of the English Language, 2002.

C. Keck and . Mari, Modal use in spoken and written university registers: a corpus-based study, English Modality in Perspective. Peter Lang, Frankfurt am Main, pp.3-25, 2004.

A. Klinge, The English modal auxiliaries: from lexical semantics to utterance interpretation, Journal of Linguistics, vol.25, issue.02, pp.315-357, 1993.
DOI : 10.1515/9783110860184

A. Kratzer, The notional category of modality, Words, Worlds, and Contexts. New Approaches in Word Semantics. de Gruyter, pp.38-74, 1981.

A. Kratzer, Modality Semantics: An International Handbook of Contemporary Research, pp.639-650, 1991.

G. Lakoff, A note on vagueness and ambiguity, Linguist. Inq, vol.1, pp.357-359, 1970.

G. Leech and J. Coates, Semantic indeterminacy and the modals, Studies in English Linguistics for Randolph Quirk, pp.79-90, 1979.

G. Leech and C. Mair, Current changes in English syntax The Handbook of English Linguistics, pp.318-342, 2006.

G. Leech, C. Mair, . Hundt, . Marianne, and N. Smith, Change in Contemporary English. A Grammatical Study, 2009.
DOI : 10.1017/cbo9780511642210

J. Lyons, Semantics, 1977.

R. Nordlinger, E. Traugott, and . Closs, Scope and the development of epistemic modality: evidence from ought to, English Language and Linguistics, vol.33, issue.02, pp.295-317, 1997.
DOI : 10.2307/414841

. Nuyts, Epistemic Modality, Language, and Conceptualization: A Cognitive-Pragmatic Perspective, 2001.
DOI : 10.1075/hcp.5

F. R. Palmer, Modality and the English Modals, 1990.

F. R. Palmer, Mood and Modality, second ed, 2001.

A. Papafragou, Inference and word meaning: The case of modal auxiliaries, Lingua, vol.105, issue.1-2, pp.1-47, 1998.
DOI : 10.1016/S0024-3841(97)00029-6

A. Papafragou, Modality and the Semantics--pragmatics Interface, 2000.

R. Quirk, . Greenbaum, . Sidney, . Leech, . Geoffrey et al., A Comprehensive Grammar of the English Language, 1985.

Y. Ravin and C. Leacock, Polysemy: an overview, Polysemy: Theoretical and Computational Approaches, pp.1-29, 2002.

F. Recanati, Literal Meaning, 2004.
DOI : 10.1017/CBO9780511615382

URL : https://hal.archives-ouvertes.fr/ijn_00000326

F. Recanati, Truth-conditional Pragmatics, 2010.
DOI : 10.1093/acprof:oso/9780199226993.001.0001

URL : https://hal.archives-ouvertes.fr/ijn_00926114

N. Riemer, The Semantics of Polysemy. Reading Meaning in English and Warlpiri, 2005.

N. Riemer, Introducing Semantics, 2010.
DOI : 10.1017/CBO9780511808883

R. Salkie, Review of Anna Papafragou Modality and the semantics--pragmatics interface, J. Linguist, vol.38, pp.716-718, 2002.

R. Salkie, Possibility and enablement Modes of Modality. Modality, Typology and Universal Grammar, pp.319-352, 2014.

D. Sperber and D. Wilson, Relevance: Communication and Cognition, second ed, 1995.

D. Sperber and D. Wilson, Relevance and Meaning, 2012.

A. Stefanowitsch, A construction-based approach to indirect speech acts, Metonymy and Pragmatic Inferencing. Benjamins, pp.105-126, 2003.
DOI : 10.1075/pbns.113.09ste

J. Timotijevi?, The pragmatics of modal verbs in English and German, Structures Across Cultures. English Language and Literature Studies. Cigoja Stampa, pp.85-99, 2008.

J. Timotijevi?, The Semantic Domain of Possibility in English and German, 2009.

E. C. Traugott, On the Rise of Epistemic Meanings in English: An Example of Subjectification in Semantic Change, Language, vol.65, issue.1, pp.33-65, 1989.
DOI : 10.2307/414841

E. Traugott and . Closs, Approaching modality from the perspective of Relevance Theory, Language Sciences, vol.25, issue.6, pp.657-669, 2003.
DOI : 10.1016/S0388-0001(03)00017-2

P. Tregidgo, Must and may: Demand and permission, Lingua, vol.56, issue.1, pp.75-92, 1982.
DOI : 10.1016/0024-3841(82)90051-1

D. Tuggy, Ambiguity, polysemy, and vagueness, Cognitive Linguistics, vol.4, issue.3, pp.273-291, 1994.
DOI : 10.1515/cogl.1993.4.3.273

. Van-der-auwera, . Johan, and V. Plungian, Modality???s semantic map, Linguistic Typology, vol.2, issue.1, pp.79-124, 1998.
DOI : 10.1515/lity.1998.2.1.79

A. Verhulst, A Corpus-based Analysis of Root Necessity Meanings Expressed By should, Ought to and be Supposed to in Late 20th Century British English, KULeuven, 2012.

J. Verstraete, Scalar quantity implicatures and the interpretation of modality, Journal of Pragmatics, vol.37, issue.9, pp.1401-1418, 2005.
DOI : 10.1016/j.pragma.2005.02.003

V. Fintel and K. , Modality and language Encyclopedia of Philosophy, MacMillan Reference, 2006.

A. L. Walton, The Pragmatics of English Modal Verbs, 1988.

P. Westney, Modals and periphrastics in English, 1995.
DOI : 10.1515/9783110958904

D. P. Ziegeler, Omnitemporal will, Language Sciences, vol.28, issue.1, pp.76-119, 2006.
DOI : 10.1016/j.langsci.2004.10.003

A. M. Zwicky and J. M. Sadock, Ambiguity tests and how to fail them, Syntax and Semantics, pp.1-36, 1975.