- explain the types of modal verbs and their uses 
- this is a preparation for a test, so it is necessary to explain the use of all modal verbs in one lesson
- this is a summary explanation and repetition with practical examples, so a cross-section of all four worksheets is needed rather than a detailed focus on each of them
- focus on critical and specific cases of their use
- use the pictures and attach a sentence with a blank space to each one to complete the modal verb (the pictures are in the folders marked with the number of the corresponding exercises where they are to be used)
- the student has a worksheet to go through at home and revise the topic covered in the exercises