Cool MateDoesn't need to be done vs Not necessary
When to use each in English, with meaning, register, and examples.
Doesn't need to be done
Top 5,000 (fairly common)
Not necessary
Top 3,000 (common)
Most common: Not necessary
| Doesn't need to be done | Not necessary | |
|---|---|---|
| Pronunciation | 🇬🇧 //ˈdʌzənt niːd tə bi dʌn//🇺🇸 //ˈdʌzənt nid tə bi dʌn// | 🇬🇧 //nɒt ˈnɛsəsəri//🇺🇸 //nɑt ˈnɛsəˌsɛri// |
| Meaning | It's not necessary to do it. | Not needed or required. |
| Example | If you’re busy, that part of the report doesn't need to be done right away. | Bringing extra food to the picnic is not necessary. |
| Register | Neutral | Neutral |
| How common | Top 5,000 (fairly common) | Top 3,000 (common) |
| Collocations | needs to be redone, must be done, should be completed, could be ignored, might not be necessary | not necessary to include, not necessary for success, feels not necessary, considered not necessary |
| Common mistakes | Confused with 'does need to be done' which implies necessity., Overusing in contexts where terms like 'optional' or 'not essential' would be better., Misplaced in overly formal situations. | Using 'not necessary' when 'unnecessary' is more appropriate., Misplacing 'not necessary' in a sentence, leading to confusion., Adding unnecessary words, making the phrase awkward. |
| Usage notes | Used to indicate that a task is not required. Generally more informal; avoid in formal writing. | Use 'not necessary' to indicate that something is optional or unneeded. It's appropriate in both formal and informal contexts. |
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Frequently asked questions: Doesn't need to be done vs Not necessary
What's the difference between Doesn't need to be done and Not necessary?
Doesn't need to be done: It's not necessary to do it. Not necessary: Not needed or required.
Which is more common: Doesn't need to be done and Not necessary?
Not necessary is the most common in everyday English.
Can you show an example of each?
Doesn't need to be done: If you’re busy, that part of the report doesn't need to be done right away. Not necessary: Bringing extra food to the picnic is not necessary.
Can I use Doesn't need to be done and Not necessary interchangeably?
Not always. Doesn't need to be done and Not necessary are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.