The key to exercise solutions in chapter 5C - You can do it! for the textbook Roadmap A2 - Student's Book with authors Lindsay Warwick and Damian Williams from Pearson Education
Question
Listen to the sentences. Is can stressed? Is can't stressed?
Answer
can isn't usually stressed so it's pronounced in its weak form /kan/.
can't usually stressed. This helps us to hear the negative more clearly. It's pronounced /ka:nt/.