Iphonned him four days ago. нужно преобразовать в вопросительное предложение и отрецательное.

Did I phone him?
I didn't phone him four days ago.

1. Nick will visit his grandmother when he is on summer holidays.(I тип) 
Ник навестит свою бабушку, если будет на каникулах
2. I would be happy, if you showed me the city. (II тип)
Я был бы счастлив, если бы ты показала мне город
3. Tony would not have been so upset if he had known everything. (III тип)
Тони не был бы так расстроен, если бы он все знал
4. They will invite Jane if she phones.(I тип)
Они пригласят Джейн, если она позвонит
5. If l were you, I would not buy this dress. (II тип)
На твоем месте я бы не покупала это платье
6. The Browns will spend the weekend in the country if their mother is free.
(I тип)
Брауны проедут выходные за городом, если из мама будет свободна
7. If l worked in summer, I would earn some money. (II тип)
Если бы я работал летом, я бы заработал немного денег
8. If Dan had a dog, he loved it very much. (II тип)
Если бы у Дэна была собака, он бы ее очень любил.
9. If l hadn't left London, I would have met my wife. (III тип)
Если бы я не уехал из Лондона, я бы встретился со своей женой
10. Dan would enter the Medical University if he wanted to become a doctor.(II тип)
Дэн поступил бы в медицинский университет, если бы захотел стать врачом.

Утверждение:
She went to the gym at 7 o'clock.
We often travelled to London when we were students. She woke up, put some clothes on and ran out of the house. Henry James wrote many novels. Bill called Tina yesterday morning. Отрицание: I did not know what to do. I was not at school yesterday. John did not go to meeting. I was not at Bill's house. Unfortunately, we were not in Antalya.
Вопросы: Was Kim at school today? Did you see this film? Did she say him yesterday in the morning? did you buy me book? Did you know history of Paris? Скопируй все и вставь в переводчик)