31. Conjugue les verbes au prétérit simple ou au
prétérit en be + BV -ing.
a. John ... (call) while I ... (sleep).
b. When Dad... (come back) we ... (have) dinner.
c. What ... (you/do) when they ... (arrive)?
d. She ... (write) a long letter while she ... (wait) for him.
​Voila svp vous pouvez m'aider