Examples of consonant gradation in verbs of verb type 3

For the theory on consonant gradation: look here.
For the theory on verb types: look here.

Recap of the examples

As you can see above, verb type three has consonant gradation. The infinitive is weak, while all the other forms are strong.

When you negate a verb, you always take the minä-form and remove the -n. Therefore the negative forms are strong as well here, because minä gives you a strong form.