摘要:本文是英语语言论文,本研究无论在方法上还是在研究对象上都具有创新性,发生在现代英语中是常见的,而在这一现象的一些相关研究。所以是时候发现一个合理的解释,结果将是进一步研究的形态与自然语言的进步(NLP)
Chapter 1 Introduction
1.1 Background of the study
A remarkable fact is,vast amounts of research on the modal verbs, such as can, must, should, will, may, etchave made great achievement. However, some other modal forms, as an indispensable partof modality, are relatively ignored or undervalued. This part of modality is categorized as“quasi-modal”, which is defined by Collins (2009: 15) as “Modern English has anabundance of periphrastic modal forms, a somewhat loosely-define grouping formallydistinguishable form, but semantically similar to, the modal auxiliaries, and which havebeen relatively neglected in the literature on modality.”Under the term of quasi-modal, there are sets of subordinate categories of it. Quirk etal. (1985:137) distinguish those quasi-modals which have an auxiliary as their firstelement, and those do not, name them respectively “modal idioms” and “semi-auxiliaries”.However, due to the inarticulateness of Quirk et al’s denomination, Collins (2009:15)replaces “modal idioms” by “semi-modals” and “semi-auxiliaries” by “lexico-modals”.Semi-modals are the quasi-modals whose first element is an auxiliary and forms arenon-tensed, such as had better, would rather, be to and have got to. Lexico-modals in mostcases, their formation is like be + a lexical item, such as be (un)able to, be about to, besupposed to, be willing to, be going to, and be obliged to. The exceptions here are have to,need to and want to.
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1.2 Aims and significance of the study
Due to the fact that an abundance of quasi-modals are rising in the frequency of usein modern English but relatively neglected in the literature of modality, the aim of my
dissertation is to envisage the position of quasi-modals and improve the deficiency ofthem in the literature. Specifically, when the quasi-modal be able to is investigated in thedirection of word sense disambiguation, an interesting linguistic phenomenon of modalco-occurrence appears, that is, be able to usually shows up after a modal or a quasi-modal.In this way, the aim of this study is to analyze the restrictive relations of modalco-occurrence of be able to based on word sense disambiguation.Nowadays, in the age of big data, more advanced technology is available andefficiency is advocated, thus a reformation in natural language process (NLP) is urgent.Based on the previous study, the aim of the creation of this
thesis is to disambiguate thesense of be able to more efficiently in the light of FCA (formal concept analysis).Additionally, the relative phenomenon of modal co-occurrence will be analyzed, whoseresult is believed to support the WSD (word sense disambiguation) of be able to fromanother side and improved the literature of modality.This study is innovative both in its
methodology and research objects. Modalco-occurrence is common in modern English, while the relative study in this phenomenonis few. So it is time to find a reasonable explanation of it, and the findings will besignificant for further research of modality and natural language progress (NLP).
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Chapter 2
literature review
Chapter 2 presents a literature review to the research objectives in this study, which ismainly divided to two parts: one is about quasi-modal be able to, another is about modalco-occurrence. In the end, the space for this study is stated.
2.1 Previous studies on quasi-modal be able to
This section mainly states the
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