1- She worked in a bank.

2- They have gone out the night before.

3- He was coming.

4 - She had never been there before. ( Past perfect - This stays the same.)

How it works...

- Tenses---Backshift one tense (but Past Perfect stays the same)

- Time - last night to the night before.

- Subjet pronouns: (in Q2: We to They, Q3: I to He...)

 - (Also location - here to there,,,etc.)

- And more......

Hope it helps...

You're right. I have a suggestion for #5.

Do you know how many teachers your school have? ---no does