Again in the past with "you"

Level	B1
Is similar to	Comparing "zai" and "you" (B1) ; Comparing “zai" and "you" (B1) ; Doing Something Over and Over with "zaisan" (B2);
Is used for	Expressing time and date
Keywords	又, 了

Whenever you want to express something like "you did it again!" in Chinese, you may want to use 又.

Structure

There are two words for "again" in Chinese. This depends on whether the repetition has happened, or whether it's going to happen.

If the repetition has happened, i.e. it's a repetition in the past, 又 is used.

Subject + 又 + Verb + 了

Notice that 了 is used as the action is complete.

Level	B1
Is similar to	Comparing "zai" and "you" (B1) Comparing “zai" and "you" (B1) Doing Something Over and Over with "zaisan" (B2)
Is used for	Expressing time and date
Keywords	又, 了