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 Introduce with different prepositions, and you will get a different meaning every time. You can see the examples below:
1. Introduce To
Introduce to (person)
Example: Let me first introduce my friend to you.
2. Introduce into
Introduce into (make modifications)
Example: The UPSC has introduced many changes into the syllabus of the IAS examination.