1. What does Isabel usually do on Saturday mornings? 2. What is she doing this Saturday? 3. What does Mark usually do on Christmas day? 4. What is he doing this Christmas? 5. Underline the verbs in the two text, compare between the verbs that describe habits (usually) and the verbs that describe actions at the time of speaking (this Saturday/ Christmas.../ Now ...). Then complete the rules: a) When we describe habits, we put the verb in the . ... tense. b) When we describe actions at the time of speaking, we put the verb in the. tense.