1.When the rain (stop), we (go) out.
2. I (send) you a postcard when I (be) on holiday.
3. Before you (leave), you must visit the gallery.
4. Wait here until I (come) back.
5. When I (go) shopping, I (buy) some food.
6. When I (see) Tom tomorrow, I (invite) him to our party.
7. Before you (leave), don't forget to shut the window.
8. I (phone) you as soon as I (arrive) in London.