Modal verbs are not conjugated in the same way as other verbs in the present tense.

Whereas in the regular present tense, each person in the singular forms have different endings, the first person singular form (ich) and the third person singular form (er, sie, es, man) in modal verbs are the same and have no endings. This applies to all modal verbs in the present tense, eg

• er muss – he must or he has to
• man kann – one/you/they can
• sie darf – she may/is allowed

sie kann Cancan tanzen - she can do the cancan