Functions of Modal Words 165
A modal word can also make up a sentence by itself. This happens when it is used to answer a general question, that is,
a question admitting of a yes- or
no-answer.
Certainly, perhaps, maybe, etc. may be used in this way. In these cases, then, modal words are the main part of the sentence. This brings them close together with the
sentence words yes and
no. ' However, they differ from the sentence words in that the modal words can also be used as parentheses in a sentence. Thus, the question,
Are you coming? may equally be answered,
Certainly I am, or
Certainly. The sentence words
yes and
no cannot be used as parentheses. Whether the answer is
Yes, or
Yes, I am, the
yes is a sentence in both variants.
It might be possible to argue that if the answer to the question
Are you coming? is
Certainly, the word
certainly is a parenthesis, and the rest of the answer, /
am, is "understood". While such
a view cannot be disproved, it seems unnatural and far-fetched, and we will prefer the view that
Certainly in this case is a sentence.
The problem of modal words is connected with the very difficult problem of modality as a whole. This has been treated repeatedly by various scholars both with reference to English and to Russian and in a wider context of general linguistics as well.
2 We will not investigate here all the aspects of the problem. We will only mention that there are various means of expressing modality — modal words, modal verbs
(can, must, etc.) and the category of mood. Since two of them or even all three
may be used simultaneously, it is evident that there may be several layers of modality in a sentence. A great variety of combinations is possible here.
1 See p. 168.
2 See, for example, В. В. Виноградов,
О категории модальности и модальных словах в современном русском языке. Труды Института русского языка, т. II, 1950.