The Non-Concatative Morphology of Turkish Verbs

The far strangest thing about this language, which is otherwise reasonably straightforward. Is that it has non-concatative morphology in its verbs. You have a consonantal core and then vowels dance frantically around those in various ways. There are different patterns having to do with the vowels. He has a few, what's the word again? Spleation forms as well, but it's a lot of, but a lot of it seems to be this sort of vowel, vowel-changing operation.