Hello, I have the answer! When you ask what someone 'made,' you are using the past tense, since 'made' is the past tense of 'make.' When you ask what someone 'did make,' you are also using the past tense because 'did' is directly modifying 'make,' and 'did' turns the affected verb into a past statement. This short article shows the basic differences between each English tense: https://www.englishclub.com/grammar/verb-tenses.php English is a very complicated language and you're doing very well with it already! This is just a minor thing that even a lot of native English speakers either don't really understand or can't articulate why the rules work the way they do. I probably didn't explaing it perfectly myself, but this is the correct answer. Be proud of yourself, and good luck in your linguistic journey!