Here's how it breaks down:
* conocer: This is the infinitive form of the verb, meaning "to know" or "to be acquainted with."
* yo: This is the subject pronoun for "I."
* conozco: This is the conjugated form of the verb "conocer" in the present tense for the subject "yo."
So, to say "I know" in Spanish, you would use the phrase "Yo conozco."