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Using 大概 to Give Approximate Numbers
Use 大概 before a number or quantity when you want to give an estimate rather than an exact figure. Learn the common sentence patterns, practical contexts, and how context affects the meaning.
我们班大概有三十个学生。
Read the full explanation and examples
Meaning and scope
大概 can introduce an estimate: the speaker gives a useful figure but does not claim that it is exact. This is handy when you remember a number only roughly, have not checked a measurement, or expect the amount to vary. The outline places this use under number expressions at level 3. That identifies the scope of this lesson; it does not establish which examination version is currently administered at any test centre.
In this lesson, focus on 大概 followed by the number or quantity being estimated. The estimate may concern people, time, price, or distance. It gives the listener a reasonable sense of scale while leaving room for a small difference. If precision matters, provide the exact figure instead. For instance, a meeting reminder may need an approximate arrival time, while a payment request usually needs the confirmed amount.
Formation and position
大概 can directly precede a quantity, as in 大概八十块钱, or stand before a predicate containing it: 我们班大概有三十个学生 and 大概要走二十分钟. It need not sit immediately next to the digits. Keep the relevant unit clear, and use context to tell whether the estimate concerns a count, cost, distance, or time.
Examples in everyday situations
These examples show the estimate in context. The number is informative, but the wording signals that it may not be exact.
我们班大概有三十个学生。
从学校到车站大概要走二十分钟。
这本词典大概八十块钱。
我家离地铁站大概一公里。
他大概下午三点到。
In an answer about arrival time, this can estimate roughly 3 p.m. It can also convey “he will probably arrive at 3 p.m.”; 大概 before a time does not mechanically rule out a probability reading.
Choose the figure to match the situation
An estimate should still be plausible and useful. If a friend asks how long the walk takes, a rough duration is enough for planning. If someone asks for the exact address, a distance estimate does not answer the question. Include a unit when a bare number could be unclear, and choose a level of detail that fits what the listener needs.
- Compare an estimate with an exact statement. “About eighty yuan” leaves room for a difference; “eighty yuan” presents the figure directly. Use the exact form when you have confirmed the amount and the listener needs precision.
- Contrast 大概三十个学生 (“about thirty students”) with 他大概不会来了 (“he probably will not come”). In a sentence such as 他大概下午三点到, quantity or time approximation and uncertainty about the event can overlap; interpret the intended scope from context.
- Keep the estimate attached to the right information. A rough count of students, a journey duration, and a ticket price are all quantities, but the unit and surrounding words tell the listener which one you mean.
A practical check before speaking
Frequently asked questions
Does 大概 go before or after the number?
It normally appears before the quantity or before a predicate that contains it: 大概八十块钱, 大概有三十个学生. It is not a suffix after the number.
Should I include a unit?
Include one when it helps the listener understand whether the number refers to minutes, money, distance, or another quantity.
Can I use 大概 when I know the exact number?
You can, but it presents the figure as an estimate. If precision matters and you have confirmed the number, give the exact figure instead.
