What are three core parts of a pattern 2 sentence?

There's no official "Pattern 2 Sentence" in grammar. It's likely you're thinking of a specific grammatical structure or sentence type that hasn't been defined as "Pattern 2."

To help you, please tell me more about what you're looking for:

* What are you studying? (e.g., grammar, writing, English as a Second Language)

* What kind of sentence structure are you interested in? (e.g., simple sentences, compound sentences, complex sentences)

* Can you give an example of a sentence you'd consider to be "Pattern 2"?

Once I have more information, I can give you a more accurate and helpful response.