Put thw verbs in the Present Perfct Simple or Continuous, orthe Past Simple.
1.How long_____ you ____(study) at this school?
2.How long_____you_____(use) this book?
3.Which book_____you_____(have) before this one?
4.How long _______you_____(know) your teacher?

1) How long did you study at this school?2) How long have you been using this book?3) Which book have you red before this one4) How long have you known your teacher?