"Apart" = separated, at a distance; "a part" = a piece or member of something larger.
Adverb or adjective: indicates separation, distance, or distinction. Common in phrases: "apart from" (besides/except), "fall apart" (disintegrate), "take apart" (disassemble), "set apart" (distinguish).
They lived apart for two years before deciding to divorce.
Apart from a few minor errors, the report was excellent.
The two brothers are very different — they seem to come from worlds apart.
Noun phrase: the indefinite article "a" + the noun "part". Means a piece, section, or member of a larger whole. Common with "of": "a part of the team", "a part of the solution".
She feels like a part of the family now, even though she only started working here last year.
Failure is a part of learning — you cannot grow without making mistakes.
This project is a part of a larger initiative to reduce carbon emissions in the city.
Common mistake
The most common trap: "I want to be apart of this project" should be "I want to be a part of this project" (a member of the project). "Apart" (separation) makes it mean the opposite of what you want to say. Test: if you can replace with "a piece of" or "a member of", use two words. If you can replace with "separated" or "at a distance", use one word.
Trick to remember it
Remember the opposite meanings: APART separates, A PART joins. "I want to be a part of this" = I want to be a member, to join. "I want to be apart from this" = I want to distance myself. If you describe belonging to something, always use two words. Quick tell: "a part of" is almost always followed by "of". "Apart" in the sense of separation is never followed by "of".
Quick rule
Apart (one word) = separated, at a distance (apart from = except, besides). A part (two words) = a piece or member of something (always goes with "of": a part of).
Did you know?
"Apart of" does not exist in standard English — if you ever write "apart of", it is always an error. The only correct form when describing membership is "a part of". Interestingly, "a part of" can be shortened to "part of" by dropping the article: "She is part of the team" = "She is a part of the team". Both are correct. But "apart of" never is.
Exercise 1 · Pick the right one
Volunteering for the annual cleanup made him feel like _____ the community.
Exercise 2 · Pick the right one
The twins are close but they have grown _____ over the years as their lives went in different directions.
Exercise 3 · Form the word
Apart (one word) = separated, at a distance (apart from = except, besides). A part (two words) = a piece or member of something (always goes with "of": a part of).
The most common trap: "I want to be apart of this project" should be "I want to be a part of this project" (a member of the project). "Apart" (separation) makes it mean the opposite of what you want to say. Test: if you can replace with "a piece of" or "a member of", use two words. If you can replace with "separated" or "at a distance", use one word.
Remember the opposite meanings: APART separates, A PART joins. "I want to be a part of this" = I want to be a member, to join. "I want to be apart from this" = I want to distance myself. If you describe belonging to something, always use two words. Quick tell: "a part of" is almost always followed by "of". "Apart" in the sense of separation is never followed by "of".
Bryan López
Founder of SpeakUP Academy