Answer:
3. Kate said that people sometimes sold drugs outside her school.
4. The police officer said they were going to study the CCTV footage that day.
5. Fred said Jack had stolen a camera from a shop the day before.
6. Sam said the police were looking for the thief who had stolen his car.
2. She said they had arrived two minutes before.
3. She said they were getting out of their car.
4. She said she recognised one of them.
5. She said he had robbed a bank in London four years before.
6. She said they looked nervous.
7. She said one of them was carrying a large black bag.
8. She said they were going into the bank.
9. She said she was going to follow them.
Explanation:
Reported speech is the description of what someone said, sort of a paraphrase since we change a few things from the original sentence.
Let's use the first sentence to explain the rules of reported speech.
"People sometimes sell drugs outside my school," said Kate.
First, we identify the speaker. In this case, Kate is the one who said the sentence. Therefore, any first person pronouns (I, my, me) should be transformed into the third person (she, her). "My school" becomes "her school".
Second, we find the verb and identify its tense. In the sentence above, it is "sell", which is in the simple present. When reporting a sentence, we change the verb to the past form of the original tense. For example: simple present --> simple past; simple past --> past perfect; etc. Thus, "sell" becomes "sold."
The whole sentence becomes:
Kate said people sometimes sold drugs outside her school.
Another rule that was not applied in the sentence above is changing time expressions to indicate an earlier time. For example: today --> that day; yesterday --> the day before; tomorrow --> the following day.