Then and than

Image source: http://cdn.meme.am/instances/35386736.jpg This is a universal mistake. Every where people use these words interchangeably and end up changing the whole meaning of the sentence. "Then" is used to indicate that something is happening at a point of time. It is an adverb. it is also used with sentences beginning with "if". "Than" is used for comparison. It is a conjunction. For example: a. If you use proper words then nobody would judge you. In this sentence, "then" is used to describe an action that would happen if something is done. b. Her grammar is better than his. In this sentence, "than" is used to compare his and her grammar.