Giúp mình với ạ 1.Her father said: " I was in a business trip yesterday" 2. Nam said to me" I have just passed the exam" 3. He said "My son is serving in the army now'' 4. Ben said to the girl: "I am glad to see you here so early"

1.Her father said: " I was in a business trip yesterday"

Her father said he had been in a business trip the day before

2. Nam said to me" I have just passed the exam"

Nam told me he had just passed the exam

3. He said "My son is serving in the army now''

He said his son was serving in the army then

4. Ben said to the girl: "I am glad to see you here so early"

Ben told the girl he was glad to see her there so early