1 when you will go to the museum
2 when andrew will send us letter by email
3 when the lesson is over
4 if you don't help me
5 when the meeting begins
6 if will come to his party
7 when we will have our last lessons on geography
8 if you don't open the window
9 if he will stay in Moscow for a long time
10 if they will come but if they come