Hi there!
1. If James were taller, he would play basketball. (II)
If James had been taller, he would have played football. (III)
2 Unless Barbara had studied a lot, she wouldn`t have learnt to speak English fluently.
3 The pilot wouldn`t have landed if there hadn`t been an emergency .
4 The thief would have escaped if a policeman hadn`t stopped him.
5 If you put this paper into that drawer,nobody would touch it. (II)
If you had put this paper into that drawer, nobody would have touched it.(III)