We make the negative form by adding вЂnotвЂ™.The question form is created by inverting the subject and the verb.Modal verbs donвЂ™t add -s for the third person singular, so the form is always the same.The convenient thing about modal verbs is that they all have some key things in common:

Modal verbs can express obligation, advice, permission, offers, the future, and possibility. For example, the phrase вЂњThey go to schoolвЂќ can change meaning with a modal verb in the following ways: While auxiliary verbs help make questions and negatives and put a verb in a particular tense, modal verbs add a special meaning. So hereвЂ™s your chance to find out more about these two important modal verbs, then you can practice using them yourself.ДЄ modal verb is a verb that is used in combination with a normal verb. Perhaps youвЂ™ve heard about вЂmayвЂ™ and вЂmightвЂ™ and not been sure about what they mean and when theyвЂ™re used. YouвЂ™ve probably already studied some modal verbs in English, like вЂcanвЂ™ and вЂmustвЂ™.

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Auxiliary and modal verbs exercises