Like in many other languages, the verb 'to be' (Macedonian 'сум') is irregular. In the dictionary, you will find it listed under the first person singular form of the present tense, 'сум', rather than the third person singular form of the present tense, as with other verbs. Its conjugation is also irregular. The present tense forms are:
јас сум
ти си
тој/таа/тоа е
ние сме
вие сте
тие се