Modal verbs are different verbs that behave irregularly in English. They give additional information about the function of the main verb. Match the columns relating modal verb to its function: First column : Modal Verbs 1- Must 2- Can 3- May 4- Ought to 5- Could Second column : Communicative Functions ( ) Probability ( ) Polite permission ( ) Ability ( ) Obligation ( ) Advice Choose the alternative that presents the correct match: