1. He is brushing his teeth. He's brushing his teeth. Он чистит зубы.
2. I'm doing a test. I am doing a test. Я делаю тест.
3. We are not joking. We're not joking. Мы не шутим.
4. I am not reading. I'm not reading. Я не читаю.
5. They aren't working. They are not working. Они не работают.