You are going to practise modal verbs of deduction
You may have liked the previous exercise on modals. You could even have learned something from it. So here's another. Sherlock Holmes was famous for his deductions and must have been the greatest fictional detective of his day. He certainly solved a lot of cases so he can't have been bad at it. Let's see if he's any good at explaining how to make present and past deductions...
Look at the presentation below and make sentences to practise modal verbs of deduction