Free PDF worksheets with answers:
- Complete sentences with must or needn't and verbs from the box.
- Use mustn't or needn't to make sentences with similar meanings.
- Make correct sentences with must or have to.
- Complete sentences with needn't or don't have to and verbs in brackets.
English grammar PDF grammar rules with examples from everyday English.
Modal verbs exercises with answers PDF Worksheets with answer keys and grammar rules.
All these materials are written for students and teachers of English as a foreign language.