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Step 2 Presentation
1.Show pictures to learn “could ” ,”couldn’t ’ “ago ”
2.Ask and answer in pairs
A:Ｉcan --- now .But I couldn’t --- ago .
What about you ?
B: I can --- .
3.Show pictures in part 2 and make sentences according to example .
4.Show pictures of 1a to lead to passage .
①Ask two questions ,then explain keys points .
②Read 1a and complete the table in 1b .
③Check the answers
④Work in pairs . Ask and answer with the information in 1b .
Step 3 Conlidation
1. Fill the blanks accoring to passage .
2. Read together .