United States. War Department, Dictionary of Spoken Russian — §30… (1945)
“ The pr of durative verb is the only verb form that states an action in present time. A future action of a dur verb is expressed by a combination of a pct present, usually буду, будет, with the dur inf: я буду писать "I shall be writing ”
United States. War Department, Dictionary of Spoken Russian — §30… (1945)
“ Thus, the compounding durative stem of писать is -писывать, used in forming подписывать "to sign," dur of подписать. Thus on says я подпишу письмо "I'll sign the letter," but я подписываюю письма "I sign (or am signing) the letters." Similarly, compound duratives приписывать "to prescribe," выписывать "to copy out," and so on. ”
United States. War Department, Dictionary of Spoken Russian — §30… (1945)
“ The preverb вы- is stressed in pct verbs, but not in compound duratives: вынуть "to take out" pct, but dur вынимать. In addition to compound duratives, some other verbs that contain preverbs are durative: надеяться "to hope." Compounds with без and не are not pct: беспокоить "to disturb," pct обеспокоить; ненавидеть "to hate," compare the pct compound verb возненавидеть "to conceive a hatred of." ”
