In spite of the vast literature on modality in English, very little research has been done on modal adverbs as a group. While there are studies of individual adverbs, the semantic and pragmatic relations between them have been left largely unexplored. This book takes a close look at the whole field of modal certainty as expressed by adverbs in English. On the basis of corpus data the most frequent adverbs of certainty, including certainly, indeed, and no doubt, are examined from the point of view of their syntactic, semantic and pragmatic characteristics.

In this text, a variety of modal logics at the sentential, first-order, and second-order levels are developed with clarity, precision and philosophical insight. All of the S1-S5 modal logics of Lewis and Langford, among others, are constructed. A matrix, or many-valued semantics, for sentential modal logic is formalized, and an important result that no finite matrix can characterize any of the standard modal logics is proven. Exercises, some of which show independence results, help to develop logical skills.

Practise Your Modal Verbs
by Mike Watkins
A workbook to help you practice use of modal verbs - will, would, shall, should, ought to, can, could, might, may, must etc. (27 Units. Answers at end of book).