Cool MateThat's important vs That's one thing
When to use each in English, with meaning, register, and examples.
That's important
Top 3,000 (common)
That's one thing
InformalTop 2,000 (common)
Most formal: That's importantMost common: That's one thing
| That's important | That's one thing | |
|---|---|---|
| Pronunciation | 🇬🇧 //ðæts ɪmˈpɔːtənt//🇺🇸 //ðæts ɪmˈpɔrtənt// | 🇬🇧 //ðæts wʌn θɪŋ//🇺🇸 //ðæts wʌn θɪŋ// |
| Meaning | This matters a lot. | A phrase used to highlight a single important point or fact. |
| Example | It's crucial to remember that **that's important** in our discussion. | That's one thing I really appreciate about this team. |
| Register | Neutral | Informal |
| How common | Top 3,000 (common) | Top 2,000 (common) |
| Collocations | that's crucial, that's significant, that's essential, that's vital, that's necessary | that's one thing I've learned, that's one thing we all agree on, that's one thing to remember |
| Common mistakes | Using it in overly formal contexts., Confusing 'that's important' with 'that's necessary', which may imply obligation. | Misusing it in formal contexts like presentations., Omitting the context; it needs a preceding point to be clear., Confusing it with 'that's one thing' and 'this is one thing'. |
| Usage notes | Use when emphasizing the significance of something. Appropriate in both casual and serious conversations. | Use this phrase to emphasize an important aspect of a conversation. It's informal and best for casual discussions. |
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Frequently asked questions: That's important vs That's one thing
What's the difference between That's important and That's one thing?
That's important: This matters a lot. That's one thing: A phrase used to highlight a single important point or fact.
Which is more formal: That's important and That's one thing?
That's important is the most formal of these.
Which is more common: That's important and That's one thing?
That's one thing is the most common in everyday English.
Can you show an example of each?
That's important: It's crucial to remember that **that's important** in our discussion. That's one thing: That's one thing I really appreciate about this team.
Can I use That's important and That's one thing interchangeably?
Not always. That's important and That's one thing 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.