Ответ:

1. Present Simple описывает привычку (usually, every morning); Present Continuous — действие сейчас или временную ситуацию (today, Look!).

  1. She usually walks to school, but today she is taking the bus because it’s raining.
  2. Look! The children are playing football in the garden.
  3. My dad reads the newspaper every morning.

2. Past Continuous обозначает длительное действие, на фоне которого произошло короткое действие в Past Simple. Для параллельных действий используются две формы Past Continuous.

  1. We were having dinner when the phone rang.
  2. Yesterday at 5 p.m., I was waiting for my friend at the bus stop.
  3. He bought a new bike last weekend.
  4. She was tidying up her room while her sister was washing the dishes.

3. Present Perfect употребляется с know и в отрицании с yet; Present Perfect Continuous подчёркивает длительность действия.

  1. I have known her since we were children.
  2. He has been working in the garden all morning and he’s very tired.
  3. We haven’t seen that film yet.
  4. The children have been watching cartoons for two hours.