Вопрос:
Have you ever ridden a horse?
Отрицание:
You haven't ridden a horse.
You можешь заменить на I. В данном контексте эти местоимения взаимозаменяемы.
1. The chief engineer wasn’t in his office a few minutes ago.
Was the chief engineer in his office a few minutes ago?
2. I didn’t write a letter to Nick in the morning.
Did I write a letter to Nick in the morning?
3. I didn’t speak to the Dean on Tuesday.
Did I speak to the Dean on Tuesday?
4. They didn’t go to the country for the weekend.
Did They go to the country for the weekend?
5. This student didn’t take an active part in the discussion yesterday.
Did this student take an active part in the discussion yesterday?
Объяснение:
Have I ever ridden a horse?
I haven't ridden a horse .