Номер 4а

Краткий ответ:

1. sent
2. was feeling
3. cheered
4. have already been
5. have never been
6. have been studying

Полный текст:

I am writing to thank you for the lovely card and flowers you sent me last week when I was ill. It was very kind of you and they arrived just when I was feeling very low, so they really cheered me up. I’m much better now and I have already been back at school for a couple of days. I have an awful lot of schoolwork. I have never been so busy. For the last two nights, I have been studying until midnight to try and catch up.

Почему употребляются эти времена:

• sent — Past Simple: действие произошло в законченное время в прошлом (last week).
• was feeling — Past Continuous: состояние продолжалось в момент другого действия (they arrived).
• cheered — Past Simple: законченное действие в прошлом — цветы подняли настроение.
• have already been — Present Perfect: действие связано с настоящим; есть слово already.
• have never been — Present Perfect: опыт или состояние до настоящего момента; есть never.
• have been studying — Present Perfect Continuous: действие длится в течение периода, начавшегося в прошлом и связанного с настоящим (for the last two nights).