There are a number of preposition words that change the meaning of a phrase when used with a particular word. For example, you can use Think with different prepositions, and you will get a different meaning every time. You can see the examples below:
1. Think over
Think over (to consider)
Example: The society agreed to think over the case in the next meeting.
2. Think on
Think on (meditate)
Example: I have been thinking on this matter for the last many days.
