三天两头 sān tiān liǎng tóu
every few days; constantly
Literally: three days two ends
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Origin
Descriptive; no single source story. Colloquial northern expression.
How to use it
Adverbial; neutral to mildly negative. Often 三天两头生病/迟到.
Example sentences
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- 他三天两头迟到，老板很不高兴。Tā sān tiān liǎng tóu chídào, lǎobǎn hěn bù gāoxìng.He's late every few days and the boss is very unhappy.he three days two ends late, boss very not happy
- 最近天气变化大，孩子三天两头感冒。Zuìjìn tiānqì biànhuà dà, háizi sān tiān liǎng tóu gǎnmào.The weather has been changing a lot lately and the child keeps catching colds.recently weather change big, child three days two ends catch-cold
More chengyu about time & change
- 不知不觉bù zhī bù juéunconsciously; before one knows it
- 一天到晚yī tiān dào wǎnall day long; from morning till night
- 一年四季yī nián sì jìall year round; throughout the year
- 从早到晚cóng zǎo dào wǎnfrom morning till night; the whole day
- 日新月异rì xīn yuè yìchanging with each passing day; rapid progress
- 争分夺秒zhēng fēn duó miǎoto race against time; make every second count
- 一朝一夕yī zhāo yī xīin a single day; overnight (usually in the negative)
- 千变万化qiān biàn wàn huàever-changing; endless variations