个个
gè gè
Reduplication of measure words
Doubling a measure word means "every single one" — with emphasis.
Measure Word + Measure Word + 都
How it works
个个都很好 — every single one is good. 天天 (every day), 年年 (every year), 人人 (everybody) work the same way.
Like 每, a doubled measure word wants 都 before the verb.
It is more emphatic and more colloquial than 每个: 天天 sounds warmer than 每天.
Examples
gè gè dōu hěn hǎo
个个都很好。
Every single one is good.
tā tiān tiān dōu chí dào
他天天都迟到。
He's late every single day.
rén rén dōu zhī dào zhè jiàn shì
人人都知道这件事。
Everybody knows about this.