"To"
* Preposition: Indicates direction, purpose, or a destination.
* "I went to the store."
* "I need to eat."
* "He gave the book to her."
* Part of an infinitive: Forms a verb phrase, often with another verb.
* "I want to learn French."
* "They decided to leave."
* Part of an expression: Combines with other words to create a set phrase.
* "Come to think of it..."
* "Up to now..."
"Too"
* Adverb: Means "also" or "excessively."
* "I'm tired too." (also)
* "It's too hot outside." (excessively)
Remember:
* Sound: "To" often sounds like "tuh," while "too" sounds like "too."
* Meaning: The context will usually tell you which word is correct.
Here are some examples to help you differentiate:
* "To": "I need to go to the doctor." (preposition and part of an infinitive)
* "Too": "It's too late to go now." (adverb and preposition)
If you are ever unsure, try reading the sentence out loud. The correct word will sound natural.