He thought there'd be time to look at the papers before he went out.

• I thought there'd be time to look at the papers before I went out.
• There'd be time to look at the papers before I went out.
• There'll be time to look at the papers before I go out.

She wondered whether she was seeing things.

• I wondered whether I was seeing things.
• Am I seeing things?/I must be seeing things.
• Am I seeing things?

She'd heard the mansion had been bought by a TV producer.

• The mansion has been bought by a TV producer.
• I'd heard the mansion had been bought by a TV producer.
• I've heard the mansion has been bought by a TV producer.

They didn't know how much food would be needed.

• I didn't know how much food would be needed.
• I don't know how much food is needed.
• How much food will be needed?

He wondered if the time had come when he'd have to move out.

• Has the time come when I'll have to move out?
• I wondered if the time had come when I'd have to move out.
• I wondered if the time had come when I have to move out.

He thought it would be a relief when she left.

• I thought it would be a relief when she left.
• It will be a relief when she leaves.
• It would be a relief if she left.

She was going to visit her grandmother that day, she remembered.

• I was going to visit my grandmother that day, I remembered.
• I was going to visit my grandmother.
• I'm going to visit my grandmother today.

They wondered when the meeting would take place.

• When the meeting would take place?
• I wondered when the meeting would take place.
• When will the meeting take place?