Double into Complex Sentences

Double into complex sentences:
1. Co-ordinate main clause के स्थान पर किसी subordinate clause का प्रयोग कर double sentence को complex में बदला जा सकता है।
Look at these sentences:
Double-
(a) Spare the rod and spoil the child.
Complex-
(a) If you spare the rod, you spoil the child.