This package is designed with the intention of being used in class or for students who want to work independently. It covers several uses of the imperfect. Therefore, you have to study it during two or three sessions. However, if a student has previous practice with this subject, s/he can complete it during one or two sessions.
It contains 11 uses of the imperfect. On each page, there is a box with examples. After this, practice exercises are shown.