yígòng duōshao qián?
How much in total?
快一点
A bit faster
This is an imperative phrase: 快 (kuài, 'fast') plus 一点 (yìdiǎn, 'a bit'). It's a direct request, not a full sentence.
快点儿
kuài diǎnr
A bit faster (colloquial) — More casual and colloquial, common in northern China.
请快一点
qǐng kuài yìdiǎn
Please be a bit faster — More polite because it adds 'please'.
快一点,我们要迟到了!
kuài yìdiǎn, wǒmen yào chídào le!
Hurry up, we're going to be late!
我知道,但交通很糟糕。
wǒ zhīdào, dàn jiāotōng hěn zāogāo.
I know, but the traffic is terrible.
Appropriate
Avoid when
You can say 'kuài yìdiǎn' (快一点), which means 'a bit faster'. It's a common way to urge someone to speed up.
It's pronounced 'kuài yìdiǎn'. The tone for 快 is fourth, 一 is second (because it's before a fourth tone), and 点 is third.
Use it in casual situations when you want someone to hurry up, like telling a friend to walk faster. It's informal, so add '请' (please) to be polite with strangers.
Tomyo
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