过去完成时课件(方案B)_图文.ppt
1. cleaned the blackboard
2. closed the window
had cleaned the blackboard
closed the window
She had cleaned the blackboard before she closed the window.
After she had cleaned the blackboard , she closed the window.
drank water
had run out of breath
1. ran out of breath
2. drank water
He had run out of breath before he drank water.
After he had run out of breath, he drank water.