 When Americans want to use the negative form of the verb CAN in slow speech, they say CANNOT. Listen to Pete use CANNOT. You can be a teacher in a school. No, I cannot teach. However, in fast speech, many Americans reduce CANNOT to CAN'T. Now, listen to Pete use the short form of CANNOT, CAN'T. No, I can't code. I can't teach. I can't cook. Anna, I can't do anything. Now, you try it. Use CAN'T in a sentence. Can you cook? No, I can't cook. In slow speech, CANN sounds like CANN. In fast speech, it often sounds like CANN. Listen to Anna talking to Pete about being a teacher. Can you teach? You can be a teacher in a school. Now, you try it. Say CANN like this. CANN. Can you cook? Say CANN like this. CANN. You can be a chef in a restaurant.