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Questions & Answers about Kävelemmekö me ulkona?
Why does kävelemmekö use the -kö ending instead of -ko?
This is vowel harmony in action! The root of the word has the front vowel ä and the neutral vowel e. Because there is a front vowel, any endings attached to it must also use front vowels. Therefore, we use the front-vowel question ending -kö.
Where exactly does the question ending -kö attach to the verb?
It attaches to the very end of the fully conjugated verb. First, you take the verb stem, add the "we" ending -mme to get kävelemme (we walk), and then you add the question clitic -kö to the very end to make it a question.
If kävelemmekö already means "are we walking", why is the word me in the sentence?
You don't actually need it! Because the verb ending -mme already tells us "we" are doing the walking, the pronoun me is optional. Including it is just a stylistic choice, often used for mild emphasis or flow.
Does vowel harmony apply to ulkona as well?
Yes, it does! The base of the word contains the back vowels u and o. Because it contains back vowels, the ending must also use a back vowel, which is why it ends in -na instead of -nä.