莫非 (mòfēi) is a Mandarin grammar pattern that voices a suspicious hunch — you place it at the start of a clause to ask "Could it be that..." or "Don't tell me..." when something seems off. It always forms a question and signals that you have a guess but are not certain.
The structure is simple: 莫非 + Speculative Clause？ You use it when a situation strikes you as unusual and you want to confirm a suspicion. For example:
他最近天天加班，莫非要升职了？
(tā zuì jìn tiān tiān jiā bān, mò fēi yào shēng zhí le?)
He has been working overtime every day lately — could it be he is getting promoted?
Here, the speaker notices a colleague's unusual behavior and uses 莫非 to voice a surprised guess. The same pattern applies elsewhere: 莫非你已经知道了？(mòfēi nǐ yǐjīng zhīdào le?) — "Don't tell me you already knew?" The key insight is that 莫非 says "I have a hunch, but I am not sure," making it ideal for moments when a friend is acting strangely or facts do not add up.
This entry on the HSK 6 lessons hub page is a live conversation lesson where you talk out loud with AI teacher Mei Lin in real time — voice, not typing. Each lesson targets one specific grammar pattern and takes roughly 10 minutes. Mei Lin corrects your grammar and pronunciation in the flow of conversation and adapts to your level.
In this lesson, you practice voicing suspicions and surprised guesses using 莫非. Mei Lin presents scenarios where something seems off — a friend acting strangely, a colleague working late every night — and you respond by forming 莫非 questions on the spot. The first lesson can be tried free, with no credit card required to start talking.
When you are ready for more advanced grammar, try another HSK 6 live lesson on reporting subtle changes with 有所 (yǒusuǒ) or another HSK 6 live lesson on building your case with 况且 (kuàngqiě). You can also reinforce your writing with the free printable Chinese worksheet generator, which offers ready-made packs for HSK 1–3 words.
莫非 (mòfēi) means "Could it be that" or "Don't tell me" — it expresses surprise or suspicion when something seems off. You place it at the start of a speculative clause to voice a hunch you are not fully sure about, and it always forms a question.
莫非 specifically carries a tone of suspicious speculation — it implies something feels wrong or unusual. Unlike neutral guesses, it signals that the speaker is surprised and slightly doubtful, making it ideal for situations where a friend is acting strangely or facts do not add up.
You will practice forming 莫非 questions in real-time voice conversation with AI teacher Mei Lin. She presents scenarios where something seems off, and you respond by voicing suspicions using the 莫非 + Speculative Clause structure, receiving instant corrections on grammar and pronunciation.
Each live conversation lesson targets one grammar pattern and takes roughly 10 minutes. You talk with Mei Lin by voice, and the first lesson can be tried free with no credit card required to start.