Roy's Rocket

Roy rides a rocket to Rome on a race.
Does Roy ride a rocket to Rome on a race?
If Roy rides a rocket to Rome on a race,
where is the rocket Roy rides?

Roy rode a rocket to Rome on a race.
Did Roy ride a rocket to Rome on a race?
If Roy rode a rocket to Rome on a race,
Where was the rocket Roy rode?

The Knight

The knight was a knave.
The knave needed a new knife.
The knife was near the knight 's knee.
The knight needed the knife for the night.

Michael

Michael makes mugs for money.
Does Michael make mugs for money?
If Michael makes mugs for money, I will meet Michael for buying his mugs.

Tenses

Damon Li is a primary student now.
Damon Li was a kindergarten student four years ago.
Damon Li will be a secondary student three years later.

Damon Li writes short stories in school.
Damon Li wrote short sentences when he was a kindergarten student.
Damon Li will write long essays when he becomes secondary student three years later.