1. Off/Of
Do not use the word of after the word off. Right: The book fell off the table.
Wrong: The book fell off of the table.
2. From/Than
When you are trying to say that something is unlike something else, that something is different from something, use from. Than means in comparison to (similarity). It is illogical to use than to express difference.
Right: My ideas are different from yours.
Right: These blouses are different from those.
**Note: When differ means disagree, the correct preposition to use with it is with.
Right: I beg to differ with you.
3. Among/Between
Between is the correct preposition to use when there are two people or things involved. Among is correct when there are three or more
Right: We will put this book between the other two.
Right: We will put this book among all the many others in this group. …
