Чтобы преобразовать прямую речь в косвенную, нужно следовать нескольким шагам. Давайте рассмотрим их на примерах, которые вы привели.

1. “I'll see you tomorrow", she said.
   Преобразуем в косвенную речь:
   She said that she would see me the next day.
2. “I saw her today", he said.
   Преобразуем в косвенную речь:
   He said that he had seen her that day.
3. “I don't like this film", she said.
   Преобразуем в косвенную речь:
   She said that she didn't like that film.
4. She said, "We went swimming today."
   Преобразуем в косвенную речь:
   She said that they had gone swimming that day.
5. “I met her about three months ago", he said.
   Преобразуем в косвенную речь:
   He said that he had met her about three months before.
6. “I'll see Mary on Sunday", she said.
   Преобразуем в косвенную речь:
   She said that she would see Mary on Sunday.
7. “Pete and Sue are getting married tomorrow", she said.
   Преобразуем в косвенную речь:
   She said that Pete and Sue were getting married the next day.
8. “Pete and Sue are getting married tomorrow", she said.
   Преобразуем в косвенную речь:
   She said that Pete and Sue were getting married the next day.

Теперь давайте подведем итоги шагов, которые мы использовали:

• Поменять время глагола, если это необходимо (например, present simple на past simple).
• Изменить местоимения в соответствии с контекстом.
• Заменить указатели времени (например, "tomorrow" на "the next day").
• Добавить "that" для соединения предложений.

Следуя этим шагам, вы сможете легко преобразовать прямую речь в косвенную в других предложениях.