Cool MateWatch out vs You must be careful now
When to use each in English, with meaning, register, and examples.
Watch out
InformalTop 2,000 (common)
You must be careful now
Top 3,000 (common)
Most formal: You must be careful nowMost common: Watch out
| Watch out | You must be careful now | |
|---|---|---|
| Pronunciation | 🇬🇧 //wɒtʃ aʊt//🇺🇸 //wɑtʃ aʊt// | 🇬🇧 //juː mʌst bi ˈkeəfəl naʊ//🇺🇸 //ju mʌst bi ˈkɛrfəl naʊ// |
| Meaning | Be careful. | Be cautious or pay attention at this moment. |
| Example | Watch out for the car coming around the corner! | You must be careful now that the road is icy. |
| Register | Informal | Neutral |
| How common | Top 2,000 (common) | Top 3,000 (common) |
| Collocations | watch out for, watch out now, watch out ahead, watch out back, watch out below | be careful now, must be cautious, exercise caution now |
| Antonyms | - | be careless, take risks |
| Common mistakes | Omitting 'for' when specifying what to watch out for., Using 'watch out' as a command without context., Confusing 'watch out' with 'look out' although they are similar. | Confused with 'you should be careful now', 'Must' used incorrectly in a casual context, Omitting 'now' in urgent situations |
| Usage notes | Use 'watch out' to warn someone about danger. It's informal, suitable for conversations, but not for formal writing. | Use in situations where caution is needed; may not be suitable for casual or light-hearted conversations. |
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Frequently asked questions: Watch out vs You must be careful now
What's the difference between Watch out and You must be careful now?
Watch out: Be careful. You must be careful now: Be cautious or pay attention at this moment.
Which is more formal: Watch out and You must be careful now?
You must be careful now is the most formal of these.
Which is more common: Watch out and You must be careful now?
Watch out is the most common in everyday English.
Can you show an example of each?
Watch out: Watch out for the car coming around the corner! You must be careful now: You must be careful now that the road is icy.
Can I use Watch out and You must be careful now interchangeably?
Not always. Watch out and You must be careful now 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.