2. +: You can put out a fire, can't you?
-: You can't put out a fire, can you?
3. +: You friends have done first aid training, haven't they?
-: You friends haven't done first aid training, have they?
4. +: There was an accident in your school last year, wasn't it?
-: There wasn't an accident in your school last year, was it?
5. +: The criminal had a gun, didn't he?
-: The criminal did not have a gun, did he?
6. +: You would like to learn self-defense, wouldn't you?
-: You wouldn't like to learn self-defense, would you?
если present simple то - i run in the forest
если presenr perfect то - i have run in the forest