1. My friend is so imaginative that he could draw himself deep underwater finding treasure yesterday. 2. Everybody can / has to read Maths material slowly and tho- roughly. 3. We can / had to divide all literature into two groups depending on their form: prose and poetry. 4. Pupils mustn't / must pay much attention to all the subjects because they are all important. 5. You can / can't be a well-educated person if you don't know at least one foreign language. 6. They could / can make crafta, draw and paint in Art lessons when they were in the fifth form.​