1 When I was punished by the teacher, the principal passed along.
2 You may leave when you finish your work.
3 Tom hurts his finger when he was trying to open this bottle.
1) While I was being punished by the teacher, the principal passed by.
*用"being punished"因為係被動式
2) After you've finished your work, you can go.
3) Tom cut his finger while trying to open the bottle
When I was punished by my teacher, the principal passed through.
You can leave if you finished your work.
When Tommy tried to open the bottle, he hurt his finger.
(1) The school principle is walking through when I am being punished by my teacher.
(2) You can leave when you have finished your works.
(3) Tom hurts his finger when he is trying to open this bottle.