Mandarin · Chapter 2 · Lesson 7 · Grammar primer
Guo experiential
Prescribed by the AQA specification.
The short version
过 (guò) survives negation, 了 (le) does not
This is the cleanest test for which particle you are actually holding. 我没去 (wǒ méi qù) means 'I didn't go' on some particular occasion; 我没去过 (wǒ méi qù guò) means 'I have never been'. The 了 (le) vanishes under 没 (méi) while 过 (guò) stays clamped to the verb, and learners model one on the other and lose the 'never'.
我没去过北京 wǒ méi qù guo Běijīng
That's the gist. The full article goes deeper - more examples, the edge cases, the why - and the practice below scores like a vocabulary session and earns the same XP.
Read the full article · 10 min readPractice
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24-question session
One question at a time, mixed across the exercises in this lesson. Miss one and it comes back round before the end.
Lesson 7 of 13 in this chapter