Breakdown of Eikö uusi opettaja ole mukava?
olla
to be
uusi
new
opettaja
teacher
ei
no / not (en, et, ei, emme, ette, eivät)
Questions & Answers about Eikö uusi opettaja ole mukava?
How is the word eikö formed?
It is the 'he/she/it' form of the negative verb (ei) combined with the question ending -kö. We use the front-vowel version -kö instead of -ko because the vowels 'e' and 'i' are neutral and pair with front vowels.
Why does the sentence use ole instead of on?
Because this is a negative sentence. The word eikö contains the negative verb ei, which forces the main verb olla (to be) into its bare negative form, ole.
Why isn't there another ei before ole?
You only need the negative verb once per clause. Since ei is already attached to the question ending at the very beginning of the sentence (eikö), you just use the negative form of the main verb (ole) later on without repeating the ei.
Why is mukava in the basic form and not the partitive case (mukavaa)?
Because opettaja (teacher) is a single, countable person. When describing a whole, countable person or object with the verb 'to be', the describing adjective stays in the basic nominative form. If we were describing an uncountable mass like coffee, we would use the partitive.