Verb Type 2 (-da/-dä)

Verb Type 2 is a high-frequency group including essential actions like eating (syödä), drinking (juoda), and being able to (voida).

1. Forming the Present Tense Stem
For regular verbs, the present tense stem is found by dropping the -da/-dä. Because the stem ends in a long vowel or a diphthong, it remains the same for all persons in the present tense. A major advantage of regular Type 2 verbs is that they do not undergo consonant gradation.
Example: juoda (to drink) → stem: juo-

• minä juon
• sinä juot
• hän juo (no change!)
• me juomme
• te juotte
• he juovat

2. The 3rd Person Singular Rule
In Verb Type 1, we lengthen the vowel (hän puhuu). In Type 2, we do not lengthen it because it is already 'long' enough (hän juo, hän syö).

3. Vowel Harmony
Always remember vowel harmony when adding the 3rd person plural ending: -vat for back vowels (a, o, u) and -vät for front vowels (ä, ö, y).

4. Negative Present Tense
To form the negative present tense, use the negative verb (en, et, ei, emme, ette, eivät) and the present tense stem without any personal endings.
Example: minä en juo, hän ei syö.

5. Past Tense (Imperfect)
Past forms depend on the stem vowels. The diphthongs uo, yö, ie become oi, öi, ei: juo- → joi-, syö- → söi-, vie- → vei-. A long vowel shortens before past -i-, as in saa- → sai-. An i-final stem keeps a single i: voi- → voi-, ui- → ui-. Do not remove the first vowel from every diphthong.
Example: juoda → join (I drank), syödä → söin (I ate).
Note: For regular Type 2 verbs whose stem already ends in i (e.g., voida, tupakoida, uida, naida), the present and past tense affirmative forms are identical (e.g., minä voin means both 'I can' and 'I was able to').

6. Negative Past Tense
To form the negative past tense, use the negative verb (en, et, ei, emme, ette, eivät) and the active past participle. For Type 2 verbs, add -nut/-nyt (singular) or -neet (plural) to the infinitive stem obtained by removing -da/-dä. This also gives teh-nyt and näh-nyt, not forms built on tee- or näke-.
Example: minä en juonut (I didn't drink), he eivät syöneet (they didn't eat).

7. Irregular Exceptions
The verbs tehdä (to do/make) and nähdä (to see) belong to this type but are irregular because their stems change (k ~ zero alternation). They use a weak stem (tee- / näe-) for the 1st and 2nd persons, and a strong stem (teke- / näke-) for the affirmative 3rd person. In the negative present tense, all persons use the weak stem (the connegative form).
Example: minä teen, sinä näet BUT hän tekee, he näkevät. Negative: minä en tee, hän ei tee, he eivät näe.
In the past tense, these verbs also undergo consonant gradation: they use the weak stem for the 1st and 2nd persons (e.g., minä tein, sinä näit) and the strong stem for the 3rd person (e.g., hän teki, he näkivät).

8. The Verb 'käydä'
The highly frequent verb käydä (to visit/go) is also irregular. Present tense: minä käyn, hän käy. Past tense: minä kävin, hän kävi.