2 Put the verbs in brackets into the Present Perfect or the Present Perfect Continuous.

Краткий ответ

1. A: Have you seen dad?
   B: Yes, he’s in the garage. He has been trying to repair the car for over an hour.

2. A: I have known Ann for three years now.
   B: Has she been studying with you that long?

3. A: Bob has lost a lot of weight.
   B: Yes, he hasn’t been eating properly lately.

4. A: Have you been cleaning all morning?
   B: No. I have just started.

Как выбрать время

• Present Perfect — have/has + V3: важен результат, завершённое действие или состояние.
  Например: has lost — результат: Боб похудел; have just started — только что начал.
• Present Perfect Continuous — have/has been + V-ing: важен процесс, длительность или повторяющееся действие до настоящего момента.
  Например: has been trying for over an hour, have you been cleaning all morning.
• Глаголы состояния, например know, обычно не ставятся в Continuous: только have known.
• В № 1 Have you seen dad? — спрашиваем о результате/опыте; have been seeing означало бы «встречаться».

Проверка: в каждом ответе есть have/has; после него стоит либо V3, либо been + V-ing. В № 2 know — состояние, поэтому have known, а study — действие, поэтому has been studying.