Conditional sentences
1)if the photographer (not/be) in a hurry, he wouldn't have forgotten his camera at home

2)unless they raise some money they (not/be able) to help poor families

3)joe (volunteer) at a charity, if he had extra time

4)if she had understood how to use camera, she (not/break) it

1)if the photographer HADN'T BEEN (not/be) in a hurry, he wouldn't have forgotten his camera at home.

*conditional 3

2)unless they raise some money THEY WON'T BE ABLE (not/be able) to help poor families

* conditional 1

3)Joe WOULD VOLUNTEER (volunteer) at a charity, if he had extra time

*conditional 2

4)if she had understood how to use camera, she WOULDN'T HAVE BROKEN (not/break) it

*conditional 3