ESL Lesson Plan Past Modal Verbs: Probability

This ESL grammar worksheet focuses on past modal verbs of probability, helping students understand how to use structures such as must have, might have, and can't have to make deductions and speculate about past events.

The lesson begins with a clear explanation of the grammar rules before moving on to five engaging exercises that encourage learners to apply their knowledge and strengthen their understanding. A particular highlight is the role-play activity, which gives students the opportunity to use past modal verbs of probability in realistic scenarios while developing their speaking skills in a structured, supportive environment.