交通标志告诉人们可一直往前走.ppt

Lesson 98
1
Ann was playing the piano ,
her father came back.
when
Ann
When
2
Ann was playing the piano
her father came back.
While
Ann
3
Kate was making a dress
the telephone rang.
Kate
When
While
4
Kate was playing with a computer,
Ann knocked at the door.
Kate
Ann
When
While
when/while
5
we were talking,
the teacher came in.
they were sweeping the floor,
the bell rang
Jim was repairing his bike,
Lin Tao came to see him.
Han Mei was cooking dinner,
Lucy called her.
the girl were eating supper,
their father came home.
the twins were watching TV,
somebody knocked on the door.
While
Make sentences:
6
while
he was driving round the corner ,
the policeman shouted to him.
While
7
traffic accidents
What often causes traffic accidents?
8
What often causes traffic accidents?
The driver doesn’t obey(遵守) the traffic rules(规则).
(1) The driver is too tired.
(2) The driver is careless.
(3) The driver drives too fast.
(4) The driver drinks too much.
While people are walking on the road,they don’t obey the
traffic rules.
9
Help as much as you can.
What will you do if you see the accident?
10