If vs Supposing we're wrong

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

If

High-frequency chunkA1conjunction

Supposing we're wrong

Beyond 10,000 (less common)
Most common: If
 IfSupposing we're wrong
Pronunciation🇬🇧 /["/ɪf/"]/🇺🇸 /["/ɪf/"]/🇬🇧 //səˈpəʊzɪŋ wɪə rɒŋ//🇺🇸 //səˈpoʊzɪŋ wɪr rɔŋ//
Meaningused to talk about a situation that may happen.If we are not correct.
ExampleIf it rains tomorrow, we will stay inside.Supposing we're wrong, what backup plan do we have?
RegisterNeutralNeutral
How commonHigh-frequency chunkBeyond 10,000 (less common)
CEFR levelA1-
Part of speechconjunction
Collocationsif you want, if necessary, if possible, if I were you, if it rainssupposing we're wrong, supposing you could, supposing that happens
Antonymsunlessassuming we're right, assuming we are correct, believing we are accurate
Common mistakesUsing 'if' with incorrect verb tenses (e.g., 'if I will go' instead of 'if I go')., Confusing 'if' with 'whether' in non-conditional contexts., Neglecting to use 'if' when introducing a condition.Using 'suppose' instead of 'supposing' in continuous context, Misplacing 'we're' as 'we are' in informal speech, Confusing 'supposing' with 'assuming' when suggesting possibilities
Usage notesUse 'if' to introduce conditional situations. Suitable for both spoken and written contexts. Avoid in very formal writing where alternatives like 'should' might be preferred.Use in hypothetical discussions to suggest a possibility. Suitable for formal and informal contexts, but avoid in casual conversations.

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Supposing we're wrong

Frequently asked questions: If vs Supposing we're wrong

What's the difference between If and Supposing we're wrong?

If: used to talk about a situation that may happen. Supposing we're wrong: If we are not correct.

Which is more common: If and Supposing we're wrong?

If is the most common in everyday English.

Can you show an example of each?

If: If it rains tomorrow, we will stay inside. Supposing we're wrong: Supposing we're wrong, what backup plan do we have?

Can I use If and Supposing we're wrong interchangeably?

Not always. If and Supposing we're wrong 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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