526
Well yes, but actually no
(jlai.lu)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Okay, bad examples from my side. Changes that affect grammatical structure might be "bro" becoming popular as a pronoun, new tense structure found in Modern Mandarin or plural adjustments like German Kakteen > Kaktusse. Grammatical structure changes just as much as other aspects of a language.