Stylistics of sentence types by purpose of expression
By purpose of expression sentences divide into declarative, interrogative and imperative; when said with strong feeling each of them becomes exclamatory. Declarative sentences make up the main part of our speech; when their intonation changes, an additional meaning such as joy or hesitation is added to the message. An interrogative sentence often expresses something besides a question: surprise (Iyunda qor yog‘dimi?! “Did it really snow in June?!”), doubt and supposition (Poyezdga ulgurarmikanmiz? “I wonder whether we will catch the train”), joy and excitement, and even a command (Ovozingni pasaytirmaysanmi?! – “lower your voice”). Such uses occur mainly in the colloquial, artistic and publicistic styles. In the scientific and official styles imperative sentences are used without emotion as exact instructions («Quyidagi masalani yeching» – “Solve the following problem”), while in the colloquial and artistic styles they are often emotional.
“One sentence – three tones”: a pupil says «Keldingmi» in a tone of joy, surprise and doubt and the class finds the meaning.