3.1 Simple past and simple present tense
3.2 Introduction to the present perfect
3.3 Choose the correct auxiliary verb for the present perfect tense
3.4 Use the correct verb form, including irregular verb forms in the present perfect tense
3.5 Identify and sort present perfect and simple past sentences
3.6 Change sentences from simple past to present perfect
3.7 Create sentences in the present perfect tense
