Cool MateCertain vs Clear vs Positive vs Sure
When to use each in English, with meaning, register, and examples.
Certain
Clear
Positive
Sure
| Certain | Clear | Positive | Sure | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈsɜːtn/"]/🇺🇸 /["/ˈsɜːrtn/"]/ | 🇬🇧 /["/klɪə(r)/"]/🇺🇸 /["/klɪr/"]/ | 🇬🇧 /["/ˈpɒzətɪv/"]/🇺🇸 /["/ˈpɑːzətɪv/"]/ | 🇬🇧 /["/ʃʊə(r)//ʃɔː(r)/"]/🇺🇸 /["/ʃʊr/"]/ |
| Meaning | sure, without any doubt | Easy to see through or understand. | Having a good attitude or a good feeling about something. | certain or confident about something |
| Example | I am certain that I locked the door before leaving. | The sky is very clear today, perfect for a picnic. | She has a positive attitude that inspires everyone around her. | I am sure that we will win the game. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 1,000 (very common) | Top 1,000 (very common) | Top 1,000 (very common) |
| CEFR level | A2 | A2 | A1 | A1 |
| Part of speech | adjective | adjective | adjective | adjective |
| Collocations | be, feel, look, very, absolutely, quite, about, of, can’t say for certain, not know for certain, be, feel, look, very, absolutely, quite, about, of, can’t say for certain, not know for certain | be, seem, become, extremely, fairly, very, to, clear and concise, be, seem, become, extremely, fairly, very, to, clear and concise, be, extremely, fairly, very, about, on, be, look, become, extremely, fairly, very, loud and clear, be, become, extremely, fairly, very, be, look, seem, completely, fairly, pretty, of | appear, be, feel, extremely, fairly, very, about, be, prove, test, strongly, weakly, for, be, seem, sound, absolutely, quite, fairly, about, of | be, feel, seem, absolutely, completely, quite, about, of, be, feel, seem, absolutely, completely, quite, about, of |
| Antonyms | uncertain, doubtful, indefinite | cloudy, unclear, muddy | negative, pessimistic | uncertain, doubtful, unsure |
| Common mistakes | Confused with 'sure' in different contexts., Using 'certain' without clarifying what is certain about., Incorrectly using 'certain' to describe someone as a person (should be used for objects or ideas). | 'Clear' is often confused with 'clean.', 'Clear' is sometimes incorrectly used as a verb instead of an adjective., Learners may forget to use 'clear' to describe abstract concepts, like thoughts. | Confused with 'positive' vs 'negative'., Using 'positively' in place of 'positive' incorrectly., Mispronouncing 'positive' without the correct emphasis. | Used too casually in formal situations., Confused with 'surely' which implies a stronger confirmation., Mispronounced as 'sher' instead of 'shur'. |
| Usage notes | Use 'certain' when you want to express confidence in something. It's appropriate in both spoken and written English, but avoid it in very formal contexts where 'specific' or 'determined' may be better. | Use 'clear' to describe something easily understood or free of obstructions. It’s appropriate in both casual and formal contexts. Avoid using it in overly technical discussions where precision matters. | Use 'positive' to describe feelings, thoughts, or results. It's appropriate in most contexts, but avoid in very technical discussions where precision is key. | Used to express agreement or assurance. It's typically appropriate in most casual and formal contexts, but can feel dismissive if overused in a conversation. |
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Frequently asked questions: Certain vs Clear vs Positive vs Sure
What's the difference between Certain, Clear, Positive, and Sure?
Certain: sure, without any doubt Clear: Easy to see through or understand. Positive: Having a good attitude or a good feeling about something. Sure: certain or confident about something
Are Certain, Clear, Positive, and Sure the same CEFR level?
Certain: A2, Clear: A2, Positive: A1, Sure: A1 on the CEFR scale.
What part of speech are Certain, Clear, Positive, and Sure?
Certain: adjective, Clear: adjective, Positive: adjective, Sure: adjective.
Can you show an example of each?
Certain: I am certain that I locked the door before leaving. Clear: The sky is very clear today, perfect for a picnic. Positive: She has a positive attitude that inspires everyone around her. Sure: I am sure that we will win the game.
Can I use Certain, Clear, Positive, and Sure interchangeably?
Not always. Certain, Clear, Positive, and Sure 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.