In this had to vs. must have learning exercise, learners read for information and fill in the blanks with had to or must have plus a past participle.. Students complete six sentences.

In this must have and can't have activity, learners read the situations and write sentences using must have or can't have to respond to the situations. Students complete 10 problems.

For this vocabulary skills worksheet, students respond to 6 fill in the blanks questions that require them to use "had to" and "must have" appropriately.