For example, the stem of the verb ‘robiť’ (to do) is ‘rob-‘, and the stem of the verb ‘vidieť’ (to see) is ‘vid-‘. There are three main groups of verbs in Slovak, each with its specific set of suffixes for the present tense:

1. -á, -ia, -uj verbs (e.g., ‘dávať’ – to give)
2. -ie, -i verbs (e.g., ‘vidieť’ – to see)
3. -e, -je verbs (e.g., ‘jest’ – to eat)

To form the present tense, one should add the appropriate suffixes for each verb group according to the subject’s person and number.

Conjugating Verbs in Present Tense

Group 1: -á, -ia, -uj Verbs
The present tense suffixes for -á, -ia, and -uj verbs are as follows:

1st person singular: -ám       (dávam)
2nd person singular: -áš       (dávaš)
3rd person singular: -á        (dáva)
1st person plural:   -áme      (dávame)
2nd person plural:   -áte      (dávate)
3rd person plural:   -ajú      (dávajú)

Group 2: -ie, -i Verbs
The present tense suffixes for -ie and -i verbs are as follows:

1st person singular: -ím       (vidím)
2nd person singular: -íš       (vidíš)
3rd person singular: -í        (vidí)
1st person plural:   -íme      (vidíme)
2nd person plural:   -íte      (vidíte)
3rd person plural:   -ia       (vidia)

Group 3: -e, -je Verbs
The present tense suffixes for -e and -je verbs are as follows:

1st person singular: -em       (jem)
2nd person singular: -eš       (ješ)
3rd person singular: -e        (je)
1st person plural:   -eme      (jeme)
2nd person plural:   -ete      (jete)
3rd person plural:   -ejú      (jejú)

Irregular Verbs and Exceptions

Some verbs in Slovak are irregular and don’t follow the standard conjugation patterns. For example, the verbs ‘byť’ (to be) and ‘vedieť’ (to know) have irregular present tense forms:

Byť (to be):
1st person singular: som
2nd person singular: si
3rd person singular: je
1st person plural:   sme
2nd person plural:   ste
3rd person plural:   sú

Vedieť (to know):
1st person singular: viem
2nd person singular: vieš
3rd person singular: vie
1st person plural:   vieme
2nd person plural:   viete
3rd person plural:   vedia

Additionally, some verbs experience stem changes in the present tense. For example, the verb ‘brať’ (to take) changes its stem ‘br-‘ to ‘ber-‘ in the present tense.

Using the Present Tense in Context

The present tense is used to talk about current actions, general statements, or habits. Some examples of the present tense in context include:

1. Robím večeru. (I am making dinner.)
2. Slávka často číta knihy. (Slávka often reads books.)
3. Poznáme sa už dlhú dobu. (We have known each other for a long time.)

It is crucial for learners of Slovak to master the present tense, as it is a foundational aspect of Slovak grammar. Understanding the conjugation rules for different verb groups, being aware of irregular verbs and stem changes, and using the present tense accurately in various contexts will help learners immensely in their journey to fluency in Slovak.