Verb Tenses - Skyline College
www.skylinecollege.edu › ReaderVerbTensesExercise 4 – Progressive Tenses In the following sentences, change the simple tense verbs to progressive tense verbs using the same time period (present, past, future). Avoid the perfect tense for this exercise. Example: Martians land on the planet Earth. (present) Martians are landing on the planet Earth. (present progressive)