Question

You should avoid to make such stupid mistakes.
1) avoid to made
2) avoid make
3) avoid making
4) avoid to have

Answer 1

Avoid making is the answer....

Answer 2

You should avoid making stupid mistakes. The third option avoid making is right.

The first option avoid to made is wrong, because the word to should not be followed by a past tense verb. The option 2 - avoid make is wrong because the combination of avoid and make is wrong.

The option 4 - avoid to have is wrong because it doesn’t suit the sentence contextually. So, You should avoid making stupid mistakes is right.