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难点：过去进行时和一般过去时的综合使用。
Do you think Tom and Jerry are good friends?
Look at the pictures and fill in the blanks with the correct forms of the key words.
knock at / take a shower
1
1. When the cat knocked at the door the mouse _____________________ .
was taking a shower
come out / sleep
2
2. The mouse was hungry. When he
__________ of the bathroom to look
for food, the cat ______________ .
came out
was sleeping
?［'h??gri］饥饿的
wake up / carry
3
When the cat woke up, the
mouse ______________ his cake.
was carrying
?［w?uk］醒来，wake的过去式
enjoy / chat
4
The mouse and the cat
_______________ happily while they were enjoying the moon.
were chatting
↘［'h?pili］快乐地
一、过去进行时和when连用
A was\were+doing sth when B+did sth.
长时动作 短时动作