凡是 + Category + 都 + Verb Phrase
凡是 means "all" or "every" and is used to make a sweeping generalization about an entire category. It introduces a condition that applies universally, often paired with 都 in the main clause. For example, 凡是学生都可以参加 means "all students can participate."
凡是迟到的同学都要写检讨。
Fánshì chídào de tóngxué dōu yào xiě jiǎntǎo.
Any student who is late must write a self-criticism.
凡是她做的菜都特别好吃。
Fánshì tā zuò de cài dōu tèbié hǎochī.
Everything she cooks is especially delicious.
凡是会员都可以享受八折优惠。
Fánshì huìyuán dōu kěyǐ xiǎngshòu bā zhé yōuhuì.
All members can enjoy a 20% discount.