1 We got lost because we didn't have a map.

=> If we had had a map, we wouldn't have got lost.

2 Mr.Mills lost his job because he was late everyday

-->If Mr.Mills...HADN'T BEEN LATE EVERYDAY, HE WOULDN'T  HAVE LOST HIS JOB...
3. John is fat because he eats so many chips

=> If John didn't eat so many chips, he wouldn't be fat.
5.

We didn't go on holiday because we didn't have enough money 

→→ If we had had enough money, we would have gone on holiday.

...