3.1 Declarative sentences

A declarative sentence contains a statement which gives the reader or the listener some information about various events, activities or attitudes, thoughts and feelings. Statements form the bulk of monological speech, and the greater part of conversation. A statement may be positive (affirmative) or negative, as in:

I have just come back from a business trip.

I haven’t seen my sister yet.

Grammatically, statements are characterized by the subject-predicate structure with the direct order of words. They are mostly two-member sentences, although they may be one-member sentences, as in:

Very early morning.

Statements usually have a falling tone; they are marked by a pause in speaking and by a full stop in writing.

In conversation, statements are often structurally incomplete, especially when they serve as a response to a question asking for some information, and the response conveys the most important idea.

Where are you going? - To the library.

3.2 Interrogative sentences

Interrogative sentences contain questions. Their communicative function consists in asking for information. They belong to the sphere of conversation and only occasionally occur in monological speech.

All varieties of questions may be structurally reduced to two main types, general questions (also called “yes-no” questions) and pronominal questions (otherwise called “special” or “wh” - questions). Both are graphically identified by a question mark. The two main types have a number of structural and communicative modifications.

3.3 General questions

In general questions the speaker is interested to know whether some event or phenomenon asked about exists or does not exist; accordingly the answer may be positive or negative, thus containing or implying “yes” or “no”.

A general question opens with a verb operator, that is, an auxiliary, modal, or link verb followed by the subject. Such questions are characterized by the rising tone.

Does your sister go figure-skating?

Is that girl a friend of yours?

Can you speak French?

“Yes-no” questions may be incomplete and reduced to two words only: Can you? Does he?

A negative "yes-no" question usually adds some emotional colouring of surprise or disappointment.

Haven’t you posted the letter yet? (Why?)

General questions opening with will/would may be considered as commands and requests according to their communicative role (see § 17).

Owing to their occasional emotional colouring, “yes-no” questions may function as exclamations

3.4 Alternative questions

An alternative question implies a choice between two or more alternative answers. Like a “yes-no” question, it opens with an operator, but the suggestion of choice expressed by the disjunctive conjunction or makes the “yes-no” answer impossible. The conjunction or links either two homogeneous parts of the sentence or two coordinate clauses. The part of the question before the conjunction is characterized by a rising tone, the part after the conjunction has a falling tone.

Will you go to the opera or to the concert to-night?