HSK 4
能否
néng fǒuwhether one can; whether it is possible
请告诉我明天能否参加。
Qǐng gào sù wǒ míng tiān néng fǒu cān jiā.
Please tell me whether you can take part tomorrow.
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Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 4.