Questions & Answers about Koira nukkuu, mutta minä luen.
Why is the word for "I read" luen instead of "luken"?
The dictionary form is lukea (to read). When you add the -n ending for "I", it closes the final syllable. This triggers consonant gradation, causing the strong consonant k to disappear entirely in the weak grade. As a result, the stem luke- becomes lue-, giving us luen.
If consonant gradation is happening, why does nukkuu still have a double kk?
The verb nukkua (to sleep) does use consonant gradation (the double kk weakens to a single k). However, the "he/she/it" form doesn't close the syllable because its ending just doubles the final vowel. Open syllables keep the strong grade, so it remains nukkuu. If you wanted to say "I sleep", the -n ending would close the syllable and force the weak grade: nukun.
Where are the words for "is" and "am" in this sentence?
Finnish doesn't use a separate "is doing" or "am doing" structure like English does. A single present tense verb like nukkuu covers both "sleeps" and "is sleeping". You just rely on the context of the sentence to decide which translation makes more sense in English.
Do I have to include minä (I), or could I just say mutta luen?