频率、重复副词

Frequency and repetition adverbs modify verbs to describe how often something happens or whether it will happen again.

常 and 常常 (often/frequently): • Both mean 'often' — 常常 is slightly more emphatic but both are correct at HSK 1. • They describe regular or habitual actions: 她常常去健身房。(She often goes to the gym.) • Position: always before the verb — 我常去图书馆, NOT 我去图书馆常.

再 (again / once more — future only): • 再 is for actions that will be repeated or continued: 你再说一遍。(Say it one more time.) • It can also signal a continuation: 他下午再来。(He'll come again this afternoon.) • IMPORTANT: 再 only works for FUTURE repetition. It cannot be used for something that already happened again in the past. For past repetition, Chinese uses 又 (you'll learn this at HSK 2+).

Common usage scenarios: — 常/常常: talking about your daily routines, habits, hobbies — 再: asking someone to repeat; planning to do something again; giving instructions

When NOT to use: — 昨天他再来了。(He came again yesterday.) → Wrong: 再 cannot describe past repetition. Use 又. — 我常常去昨天。→ Wrong: Frequency adverbs describe habits, not specific past events.