Sam doesn’t sleep/ isn’t sleeping now

Here’s how to choose between them: - Sam doesn’t sleep (present simple) - Meaning: a general habit or truth about Sam. It’s about what Sam usually does, not right now. - Commonly used with qualifiers: Sam doesn’t sleep much. Sam doesn’t sleep at night. - Sam isn’t sleeping now (present continuous) - Meaning: something happening right now or around the present moment. Sam is awake at the moment. - If you want to say the opposite (he is sleeping right now): Sam is sleeping now. Quick examples you can use in exams: - Habit: Sam doesn’t sleep much because he works late. - Now: Sam isn’t sleeping now; he’s watching a movie. - Current action opposite: If he were asleep right this moment, you’d say Sam is sleeping now. If you tell me the exact context, I can suggest the most natural sentence.