Common Mistakes : Change

noun

.BAD: We can reduce the unemployment rate with a change of the economy
.GOOD: We can reduce the unemployment rate with a change in the economy

.BAD: I’m disappointed by all the changes of London
.GOOD: I’m disappointed by all the changes in London

: Use change of when you mean that someone or something has been replaced
(What the country needs is a change of government. (= a completely new government

: When you mean that someone or something is now different in some way, use change in
.The Prime Minister has made several changes in the government

verb

.BAD: I took the camera back to the shop and changed it with another one
.GOOD: I took the camera back to the shop and changed it for another one

: change/exchange sth for sth
.I’d like to change this shirt for a smaller size