[[Biblical Hebrew]] had only two aspects (not tenses). The [[perfect aspect]] was used for completed actions, and generally implies past time. The imperfect aspect was used for uncompleted actions, and thus could imply present or future time. [[Modern Hebrew]] uses the participle for the present time and reserves the imperfect for future time. The Hebrew imperfect is noteworthy for having not only suffixes but also a syllable added at the ''beginning'' of the [[word stem|stem]], and thus is often called the ''prefix conjugation''.