Party / knew / I / anyone / . / wasn't / the / There / at

There wasn't anyone I knew at the party

The correct rearranged sentence is:
"I knew there wasn't anyone at the party."

Step 1: Understanding the sentence.
The original sentence is a mix of words with no apparent order. In order to rearrange it, we need to understand its meaning. The sentence implies that the speaker was aware that nobody was at the party.

Step 2: Identifying the subject and predicate.
In this sentence, the subject is "I," and the predicate is "knew." So, the sentence begins with "I knew."

Step 3: Putting the sentence in the correct structure.
Next, we need to place the remaining words in a logical order. Rearranging the words based on their position in a typical English sentence, we have: "There wasn't anyone at the party."

Step 4: Inserting the missing words.
To make the sentence grammatically correct and to retain the original meaning, we insert the missing words. The final rearranged sentence is: "I knew there wasn't anyone at the party."

Explanation:
The sentence is a declarative statement. It starts with the subject "I" followed by the verb "knew." The phrase "there wasn't anyone at the party" is the predicate of the sentence and describes the speaker's awareness of the absence of people at the party.

By rearranging the words and constructing a logical sentence, we convey the intended meaning clearly. This step-by-step process helps us understand the sentence structure and reconstruct it in a more comprehensible form.