Fixing the Sentence: "My friend Katrina moved to seattle Washington recently"

The original sentence has three mechanical errors:

1. Capitalization: "seattle" → Seattle; "washington" → Washington (proper nouns).
2. Punctuation: Missing comma after "Katrina" (appositive/vocative) and before the state name: Seattle, Washington.
3. Redundancy: "recently" adds nothing—"moved" is past tense, implying recency. Optional, not wrong, but tighter without it.

Corrected Versions

Standard: "My friend Katrina moved to Seattle, Washington."

With recency emphasized: "My friend Katrina recently moved to Seattle, Washington."

If Katrina is non-restrictive (only one friend): "My friend, Katrina, moved to Seattle, Washington."

Why It Matters

Proper nouns signal specific entities. The city-state comma prevents misreading ("Seattle Washington" as a name). Clean syntax respects the reader.