Verb reference
удвоить
to double
PerfectiveType II
Imperfective partner
удваивать
to double ยท Type I
Fill the verified forms for удвоить only. Its aspect partner is a separate reference and practice choice.
Present tense
Perfective verbs have no true present tense
The personal non-past forms of удвоить describe a completed future action, so they are shown in the Future section instead.