Wednesday, February 23, 2011

File 4A. Grammar: Present Perfect vs past simple

File 4A: Present perfect (1)
File 4A: Present perfect (2)
File 4A: Present perfect (3)
 
File 4A: Present perfect or past simple? (1)
File 4A: Present perfect or past simple? (2)
File 4A: Present perfect or past simple? (3)

File 4A: Present perfect or past simple? (4)
File 4A: Present perfect or past simple? (5) 




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