TO BE IN FRONT OF A VERB

Something very important that we have to remember, is that when we use "TO" as a preposition and it goes before a verb, that verb usually ends in -ING. These are some of the most common expressions followed by a verb ending in -ING:

• In addition TO- 
• Object TO-
• Oppose TO- 
• Prefer doing something TO doing another thing- 
• Be used TO- 
• Look forward TO- 
• Get around TO- 

Did not it become clear to you? Review the following examples of these expressions in simple sentences:

• In addition TO cleaning the room, I made the bed. 
• Susana objects TO goING home. 
• Pedro opposed TO signING the contract. .
• She prefers dancing TO running. .
• I’m not used TO sleepING so many hours. 
• I’m looking forward TO seeING to you again. .
• I’ll get around TO studyING after the party. 

TO at the end of a sentence

Sometimes, TO appears at the end of a question.

For example:

• Where are you travelling TO?
• Who are you talking TO?

https://www.guioteca.com/ingles/como-usar-el-to-en-ingles-valiosos-datos-para-entender-cuando-y-como-utilizarlo/