Forget vs Slip your mind

When to use each in English, with meaning, register, and examples.

Forget

Top 1,000 (very common)A1verb

Slip your mind

InformalTop 5,000 (fairly common)
Most formal: ForgetMost common: Forget
 ForgetSlip your mind
Pronunciation🇬🇧 /["/fəˈɡet/","/fəˈɡets/","/fəˈɡɒt/","/fəˈɡɒtn/","/fəˈɡetɪŋ/"]/🇺🇸 /["/fərˈɡet/","/fərˈɡets/","/fərˈɡɑːt/","/fərˈɡɑːtn/","/fərˈɡetɪŋ/"]/🇬🇧 //slɪp jɔːr maɪnd//🇺🇸 //slɪp jʊr maɪnd//
MeaningTo fail to remember something.To forget something important
ExampleI always forget where I put my keys.I meant to call you yesterday, but it completely slipped my mind.
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 5,000 (fairly common)
CEFR levelA1-
Part of speechverb
Collocationscompletely, quite, totally, seem to, tend to, want to, about, forget all about something, keep forgetting, largely forgotten, completely, quite, totally, seem to, tend to, want to, about, forget all about something, keep forgetting, largely forgotten, completely, quite, totally, seem to, tend to, want to, about, forget all about something, keep forgetting, largely forgottenslip my mind, never slip your mind, always slips my mind
Antonymsremember, recall-
Common mistakes'Forget' is incorrectly used with a gerund (e.g., 'forget doing' instead of 'forget to do')., Confusing 'forget' with 'forgive' which have different meanings., Using 'forget' inappropriately in passive forms.Confusing with 'slip of the tongue', which means saying something unintentionally., Using in formal contexts where 'forget' is more appropriate.
Usage notesUse 'forget' in neutral contexts when discussing memory. Avoid in formal writing; consider 'neglect' or 'overlook' instead.Used in casual conversations when discussing forgotten tasks or appointments. Not suitable for formal writing.

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Forget
Slip your mind

Frequently asked questions: Forget vs Slip your mind

What's the difference between Forget and Slip your mind?

Forget: To fail to remember something. Slip your mind: To forget something important

Which is more formal: Forget and Slip your mind?

Forget is the most formal of these.

Which is more common: Forget and Slip your mind?

Forget is the most common in everyday English.

Can you show an example of each?

Forget: I always forget where I put my keys. Slip your mind: I meant to call you yesterday, but it completely slipped my mind.

Can I use Forget and Slip your mind interchangeably?

Not always. Forget and Slip your mind 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.

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