Cool MateKnow what to do vs Understand
When to use each in English, with meaning, register, and examples.
Know what to do
Top 2,000 (common)
Understand
Top 1,000 (very common)A1verb
Most common: Understand
| Know what to do | Understand | |
|---|---|---|
| Pronunciation | 🇬🇧 //nəʊ wɒt tə duː//🇺🇸 //noʊ wɑt tə du// | 🇬🇧 /["/ˌʌndəˈstænd/","/ˌʌndəˈstændz/","/ˌʌndəˈstʊd/","/ˌʌndəˈstændɪŋ/"]/🇺🇸 /["/ˌʌndərˈstænd/","/ˌʌndərˈstændz/","/ˌʌndərˈstʊd/","/ˌʌndərˈstændɪŋ/"]/ |
| Meaning | Understand the correct actions to take in a situation. | To know what something means or how it works. |
| Example | When faced with a big decision, it's important to know what to do. | I need to understand the instructions clearly. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | - | A1 |
| Part of speech | verb | |
| Collocations | know what to do next, know exactly what to do, know what to do in case of emergency | clearly, well, completely, be able to, can, be unable to, about, as, be commonly understood, be generally understood, be popularly understood, clearly, well, completely, be able to, can, be unable to, about, as, be commonly understood, be generally understood, be popularly understood, clearly, well, completely, be able to, can, be unable to, about, as, be commonly understood, be generally understood, be popularly understood, clearly, well, completely, be able to, can, be unable to, about, as, be commonly understood, be generally understood, be popularly understood, clearly, well, completely, be able to, can, be unable to, about, as, be commonly understood, be generally understood, be popularly understood |
| Antonyms | - | misunderstand, confuse, overlook |
| Common mistakes | Confusing with 'knowing what to do' as a noun phrase., Using it in a past tense incorrectly, such as 'knew what to do.', Forgetting to pair it with an action verb. | Confusing 'understand' with 'understands' in the third person., Mixing 'understand' with 'understanding' incorrectly., 'Understood' used incorrectly as a present tense. |
| Usage notes | Use in both spoken and written language when advising or reassuring someone. Avoid in overly formal contexts. | Use 'understand' when you want to express comprehension of ideas or concepts. It's appropriate in both spoken and written contexts but may come across as slightly formal in casual conversations. |
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Frequently asked questions: Know what to do vs Understand
What's the difference between Know what to do and Understand?
Know what to do: Understand the correct actions to take in a situation. Understand: To know what something means or how it works.
Which is more common: Know what to do and Understand?
Understand is the most common in everyday English.
Can you show an example of each?
Know what to do: When faced with a big decision, it's important to know what to do. Understand: I need to understand the instructions clearly.
Can I use Know what to do and Understand interchangeably?
Not always. Know what to do and Understand 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.