变

His hair turned grey/white overnight.

It's getting cold/warm.

The charge for local calls will not change.

Times are changing.

He has lapsed into vice.

After he was hooked on the drug he became extremely irrational.

The food will spoil if you don't keep it cool.

The milk went/turned sour.

The road narrows here.

The wind has shifted.

Without change, there will be no development.

become/go deaf

change for the better/worse

have changed beyond recognition

The backward has become the advanced.

The magician turned the handkerchief into a dove.

transform/turn an agricultural community into an industrial community

transform mechanical energy into electricity

turn bane into boon

turn waste materials into useful things