1.I can't drive so we can't take the car
if i could  drive , we could take the car
2.We have no ladder so we can't get over the wall
if we had a  ladder , we could get over the wall
3.I haven't much time so I read very little
if i had  much time , i would read very little
4.They don't clean the windows so the rooms look rather dark
ì they cleaned  the windows , the rooms would look rather dark
5.He doesn't pay his staff properly,they don't work well so we can't take the car
 if he paid his staff properly,they woldn't work well so we can't take the car