The grammar of simple past questions with "what" can be confusing because they usually use the helping verb "did," but sometimes they don't. In this video, I explain the grammar and how to figure out the right form for your questions.
About me: I teach English to adult immigrants, refugees, and international students in the United States. I love using a flipped classroom model when possible, and that's how I got started making videos. I like to keep them short and specific so that students and teachers can get just the information they're looking for in a succinct format. Thanks for watching!