liệu ... có ... không?

I Wonder Whether

Level 5

The pattern liệu ... có ... không? is used to express uncertainty or to soften a question. It shifts a direct yes/no question into a speculative 'I wonder whether...' or 'Do you think...?'

How It Works

Syntax:

  • Standalone: Liệu (rằng) + (Subject) + (có/đã) + [Verb/Adjective] + không / hay không / chưa? (Note: The subject can also precede liệu, e.g., Trời liệu có mưa không?)
  • Embedded: (Subject) + [Verb of wondering/knowing] + liệu (rằng) + (Subject) + (có/đã) + [Verb/Adjective] + (không / hay không / chưa).
  • With Nouns: Liệu (rằng) + (Subject) + có phải (là) + [Noun] + không?

Key Characteristics:

  • Tone of Concern: Beyond simple doubt, liệu frequently conveys apprehension or worry about an outcome (e.g., Liệu chúng ta có đến kịp không? - Will we make it in time? / I'm worried we might not).
  • Standalone vs. Embedded: Liệu frequently opens a direct, standalone question (e.g., Liệu trời có mưa không? - Do you think it will rain?). It is also heavily used in embedded clauses (e.g., Tôi tự hỏi liệu... - I wonder whether...).
  • With Nouns: To use this pattern with a noun predicate, use có phải (là) instead of just có (e.g., Liệu đây có phải là sự thật không? - I wonder if this is the truth?).
  • The Closing Particle: While standalone questions usually require a final particle like không, it is completely optional in embedded/indirect clauses (e.g., Tôi tự hỏi liệu anh ấy có đến). You can also replace không with hay không to explicitly mean 'whether or not'. Native speakers frequently attach Isn't It? to the end of standalone questions to emphasize wondering out loud (e.g., Liệu trời có mưa không nhỉ?).
  • The 'Chưa' Variation: To wonder if an action has happened yet, replace có ... không with có/đã ... chưa (e.g., Liệu anh ấy đã đến chưa?).
  • Formal & Literary Variations: In formal, written, or literary contexts, liệu is frequently expanded to liệu rằng (e.g., Tôi tự hỏi liệu rằng...). Additionally, in highly formal texts, the final particle is sometimes replaced by Question Particle (Literary).
  • Register & Regional Use: It is neutral to slightly formal. In everyday casual speech across all regions, native speakers frequently use không biết (là) instead of liệu, though liệu remains more common in Northern speech than in Southern speech.
  • Watch Out: The word liệu can also function as a standalone verb meaning 'to calculate, consider, or watch out' (e.g., liệu mà làm - watch how you do it, or liệu hồn - watch out). Do not confuse this with the 'I wonder whether' pattern.

Examples (5)

  1. Liệu chiều nay có mưa không?

    I wonder if it will rain this afternoon? / Do you think it will rain later?

    Word by Word: wonder / afternoon / this / have / rain / no

    A standalone question where 'liệu' softens the inquiry, asking for the listener's speculation rather than a hard fact.

  2. Tôi tự hỏi liệu anh ấy có tham dự cuộc họp không.

    I wonder whether he will attend the meeting.

    Word by Word: I / self / ask / whether / he / have / attend / meeting / no

    An embedded question using 'tự hỏi' (to wonder). Notice that 'không' is used here, but it could be dropped entirely or replaced with 'hay không' (whether or not).

  3. Liệu Mai có thi đậu bằng lái xe không?

    Do you think Mai will pass her driving test?

    Word by Word: wonder / Mai / have / take exam / pass / license / drive / vehicle / no

    Used to express uncertainty about a future outcome.

  4. Không biết liệu dự án này có khả thi không nhỉ?

    I wonder whether this project is feasible.

    Word by Word: not / know / whether / project / this / have / feasible / no / particle

    Often paired with 'không biết' (don't know) and the final particle 'nhỉ' to emphasize the speaker's internal pondering.

  5. Liệu họ đã nhận được thư chưa?

    I wonder whether they have received the letter yet?

    Word by Word: wonder / they / past / receive / get / letter / yet

    Using the 'đã ... chưa' frame to wonder if an action has been completed yet.

Common Mistakes

  • Using 'nếu' (if) instead of 'liệu' for indirect questions.

    Tôi tự hỏi nếu anh ấy có đến không.
    Tôi tự hỏi liệu anh ấy có đến không.

    English uses 'if' for both conditionals ('If it rains...') and indirect questions ('I wonder if...'). In Vietnamese, If ... Then ... is strictly for conditionals. You must use liệu for expressing doubt or 'whether'.

  • Dropping the final question particle in standalone questions.

    Liệu anh ấy đến.
    Liệu anh ấy có đến không?

    While you can drop the final không in embedded clauses (e.g., Tôi tự hỏi liệu anh ấy có đến), standalone questions still require a closing particle like không, hay không, or chưa to be grammatically complete.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

liệu ... có ... không?Level 5I Wonder Whether

Learn This First

To understand 'liệu ... có ... không?', you first need to be comfortable with the standard Vietnamese yes-no question frame ('có ... không?'). This pattern essentially wraps that basic question in a layer of doubt, similar to the English 'I wonder if...'. Knowledge of other uncertainty markers like 'có lẽ' (perhaps) or indirect question structures helps clarify the tentative tone this pattern conveys.

Words in This Pattern

liệu