Could Should Can To suggest an alternative or a possibility To give advice For ability or possibility Uses

Must Might/ May Have to For strong obligation For remote possibilities. For recommendations Affirmative: Obligation Negative: Lack of obligation Uses

Affirmative sentences Negative sentences Questions Subject + Modal Verb + Main Verb in Base Form Subject + Modal Verb in Negative + Main Verb in Base Form Modal Verb + Subject + Main Verb in Base Form Structure

Could Should Can The express bus is full. You could take the local instead. You shouldn`t take that flight. You should take the non-stop. I can speak English, but I can´t speak Italian. Examples

Must Might/ May Have to Cabin crew must stay calm during an emergency. You might want to go walking in the Carpathian mountains. You have to go to the doctor if you feel really sick. You don´t have to show your ID to come in. Examples