What is imperfect tense?

Imperfect tense is a verb form used to indicate an action or a state that occurred in the past and was ongoing or habitual. In Spanish, it is formed by adding specific endings to the stem of the verb. The imperfect tense is often used to describe actions that took place in the past, but with no specific beginning or end. It can also be used to describe past actions that were interrupted by another action. In English, the imperfect tense is usually formed by adding the word "was" or "were" to the present participle of the verb. For example, "I was studying" or "They were walking".