Obligation

Obligation

• Must
• --Affirmative-- subjet + must + (vibf)
• example: You must go to school.
• --Interrogative-- must + subjet + (vibf)
• example: Must she return later.
• Have to
• --Affirmative-- subjet + have/has to + (vibf)
• example: You have to call her tomorrow.
• --Interrogative-- do/does + subjet + have to + (vibf)
• example: Do you have to go by plane?