Cool MateSuppose vs What if
When to use each in English, with meaning, register, and examples.
Suppose
Top 1,000 (very common)A2verb
What if
Top 1,000 (very common)
| Suppose | What if | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/səˈpəʊz/","/səˈpəʊzɪz/","/səˈpəʊzd/","/səˈpəʊzɪŋ/"]/🇺🇸 /["/səˈpəʊz/","/səˈpəʊzɪz/","/səˈpəʊzd/","/səˈpəʊzɪŋ/"]/ | 🇬🇧 //wɒt ɪf//🇺🇸 //wɑt ɪf// |
| Meaning | to think something is true, especially for planning. | a way to ask about possibilities or alternatives |
| Example | Suppose we leave early, we might avoid traffic. | What if we try a different approach? |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 1,000 (very common) |
| CEFR level | A2 | - |
| Part of speech | verb | |
| Collocations | mistakenly, wrongly, commonly, be plausible to, be reasonable to, be absurd to, reason to suppose something | what if scenario, ask what if, think what if |
| Antonyms | disbelieve, doubt, reject | definitely, certainly, indeed, for sure |
| Common mistakes | Confused with 'suppose' vs 'supposed' — don't use them interchangeably., Using 'suppose' in a command form improperly., Mistakenly using 'suppose' with a noun instead of a clause. | Use 'what ifs' incorrectly as a noun., Confuse 'what if' with 'if only'., 'What if' followed by a question mark is unnecessary. |
| Usage notes | Typically used in situations where you're making assumptions or predictions. It's less appropriate in formal writing. In casual talks, it can indicate uncertainty. | Use 'what if' to propose questions about potential scenarios. It's common in discussions and brainstorming, but avoid in formal writing. |
Frequently asked questions: Suppose vs What if
What's the difference between Suppose and What if?
Suppose: to think something is true, especially for planning. What if: a way to ask about possibilities or alternatives
Can you show an example of each?
Suppose: Suppose we leave early, we might avoid traffic. What if: What if we try a different approach?
Can I use Suppose and What if interchangeably?
Not always. Suppose and What if 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.