Scope is the part of a sentence over which an expression has interpretive force. In Không phải mọi sinh viên đều nộp bài, negation has wider scope than the universal claim: “not every student submitted.” In Mọi sinh viên đều không nộp bài, the universal has wider scope than the negative predicate: every student failed to submit. The same words can therefore describe very different situations when their structural relation changes.
Vietnamese makes many scope relations unusually visible through word order, đều, paired frames, and explicit quantifier phrases. Nevertheless, ambiguity remains when two quantified participants, an indefinite numeral phrase, or an implicit comparison standard occurs in one clause. This page develops strategies for controlling those readings. The basic formation of A + predicate + hơn + B is treated on Comparatives with Hơn, not repeated here.
A compact scope map
| Meaning intended | Prefer this frame | Interpretation |
|---|---|---|
| everyone P | mọi người đều P / ai cũng P | universal over people |
| nobody P | không ai P | negative universal |
| not everyone P | không phải ai cũng P | negation over universal |
| each X has a possibly different Y | mỗi X một Y / mỗi X ... Y riêng | covarying distribution |
| all X share the same Y | tất cả X ... cùng một Y | one shared referent |
| the whole group acts together | cả nhóm cùng P | collective |
| every group member P | cả nhóm đều P | distributed predicate |
The guiding principle is to spell out the intended relation rather than trusting an English quantifier to map word for word. Mỗi, mọi, từng, đều, cả, and interrogative + cũng are constructional resources, not inflected versions of one determiner.
Negation above or below a universal
The clearest high-negation frame is không phải…cũng/đều…. It denies complete coverage but leaves open how many members satisfy the predicate.
Không phải ai cũng biết mật khẩu mới.
Not everyone knows the new password.
Không phải mọi đề xuất đều kém khả thi hơn phương án hiện tại.
Not every proposal is less feasible than the current option.
In both sentences, some people may know and some proposals may be feasible. Compare the universal negative:
Không ai biết mật khẩu mới.
Nobody knows the new password.
Mọi đề xuất đều không đáp ứng yêu cầu pháp lý.
None of the proposals meets the legal requirement.
The last sentence literally distributes không đáp ứng over every proposal. In ordinary speech, Không đề xuất nào đáp ứng… is often easier to process. Mọi…đều không… is useful when the speaker first establishes the whole set and then rejects the predicate for each member.
With cả, the same ordering contrast appears. Không phải cả hai đội đều ghi bàn means “It is not the case that both teams scored”—perhaps only one did. Cả hai đội đều không ghi bàn means neither team scored.
Không phải cả hai báo cáo đều dài hơn bản cũ.
It is not the case that both reports are longer than the old version.
Cả hai báo cáo đều không dài hơn bản cũ.
Neither report is longer than the old version.
These readings are especially important in (formal) contracts, survey reports, and academic argumentation, where a weak “not all” claim must not be mistaken for a strong “none” claim.
One shared object or a different object per person
Numeral phrases such as một cuốn sách can remain nonspecific. In Mỗi sinh viên đọc một cuốn sách, the natural distributive reading allows a different book for each student, but context can also support one shared assigned book. Vietnamese can make either interpretation explicit.
Mỗi sinh viên đọc một cuốn sách tự chọn.
Each student reads a book of their own choice.
Tất cả sinh viên đều đọc cùng một cuốn sách.
All the students read the same book.
Mỗi…một… favors a mapping from each member to one item. Cùng một forces identity across the mappings. Words such as riêng, khác nhau, and giống nhau can further clarify the relation.
Mỗi người phụ trách một việc riêng, nhưng cả nhóm dùng chung một lịch.
Each person is responsible for a separate task, but the whole group uses one shared schedule.
This is why mỗi người một việc is more than a compressed phrase: it establishes one allocation per person. Cả nhóm một việc instead tends to present one task for the group as a whole.
Collective and distributive readings
A plural subject can participate collectively in one event or distributively in parallel events. Cùng strongly favors joint action; đều favors the same predicate holding of each member.
Cả nhóm cùng khiêng chiếc bàn lên tầng hai.
The whole group carried the table up to the second floor together.
Cả nhóm đều mang một chiếc ghế lên tầng hai.
Everyone in the group carried a chair upstairs.
In the first sentence, one table and the adverb cùng encourage a collective event. In the second, đều distributes carrying over the members, but một chiếc ghế could still be understood as one chair each or, in an odd context, the same chair handled in separate stages. To force one-per-member, say Mỗi người mang một chiếc ghế. To force one shared chair, say Cả nhóm cùng mang một chiếc ghế.
Từng adds individuation and often sequence:
Giám khảo gọi từng thí sinh vào phòng.
The examiner called the candidates into the room one by one.
Replacing từng with mọi would say that all candidates fall under a general statement, not that their entrances are separately sequenced.
Scope inside comparisons
Quantifiers can range over the item being ranked, the comparison standard, or the domain used for a superlative. The comparison predicate itself remains stable.
Mỗi vận động viên trong đội đều cao hơn tôi.
Every athlete on the team is taller than me.
Here one fixed standard, tôi, is inside every athlete-specific comparison. Now consider:
Mỗi vận động viên đều cao hơn một đối thủ.
Each athlete is taller than an opponent.
The opponent may vary with the athlete, or the context may identify one opponent whom everyone exceeds. If the distinction matters, write một đối thủ khác nhau “a different opponent” or name the shared opponent. Mỗi vận động viên đều cao hơn cùng một đối thủ explicitly gives one shared standard, though the sentence is pragmatically unusual unless that opponent is salient.
Superlative domains must also be stable. Ai cũng đẹp nhất lớp sounds contradictory if one class is intended to have a unique most beautiful member. It becomes coherent when each person is evaluated in a different domain:
Ở môn sở trường của mình, ai cũng đạt kết quả tốt nhất lớp.
In their own strongest subject, everyone gets the best result in the class.
The possessive của mình allows the subject-specific domain to shift. Careful (academic) prose should state such shifts overtly instead of relying on charitable interpretation.
Equality and proportional change likewise receive scope from surrounding phrases:
Trong nhóm đầu, các mức thưởng bằng nhau; ở nhóm sau, mỗi người nhận một mức khác nhau.
In the first group, the bonuses are equal; in the second, each person receives a different amount.
Càng học kỹ, sinh viên càng hiểu rõ vì sao mỗi cách phân tích cho một kết quả khác nhau.
The more carefully students study, the more clearly they understand why each analysis yields a different result.
Bằng nhau compares members symmetrically. Càng…càng… links two changing degrees. Neither construction inflects its adjective or quantifier; syntax carries the relation.
The core comparison–quantification inventory
| Model | Primary scope relation |
|---|---|
| cao hơn tôi | a predicate exceeds one standard |
| đẹp nhất lớp | a maximum relative to one domain |
| bằng nhau | symmetric equality among contextual members |
| càng học càng hiểu | one degree covaries with another |
| ai cũng biết | knowledge holds for every possible person |
| mỗi người một việc | one task covaries with each person |
These are separate syntactic templates, not variations produced by adjective or determiner morphology. Kém establishes a lower position on a scale; hơn an upper one; nhất an extreme; mỗi, mọi, từng, đều, cả, and cũng organize which participants the proposition covers.
Information structure can resolve an apparent ambiguity
Spoken Vietnamese uses topic–comment structure, pauses, and stress to reveal intended scope. In writing, punctuation and explicit phrases must do more of that work. Compare Cuốn nào tôi cũng đọc “Every book, I read” with Tôi đọc cuốn nào cũng được “I can read any book.” Fronted cuốn nào is a topic whose alternatives are all asserted; postverbal cuốn nào cũng được is a free-choice complement licensed by được.
Bài nào, cô giáo cũng đọc kỹ; nhưng học sinh chọn bài nào cũng được.
Every paper, the teacher reads carefully; but the students may choose any paper.
The first clause is a universal factual claim. The second grants free choice. Commas and prosody help, but predicate type—đọc kỹ versus chọn…được—is decisive.
Dialogue: the scope of a requirement
A: Mọi nhân viên đều phải học cả hai khóa à? B: Không phải ai cũng học cả hai. Mỗi người chọn một khóa bắt buộc, còn khóa kia thì ai muốn học cũng được. A: Vậy có phải cả phòng cùng học một khóa không? B: Không, mỗi người có thể chọn một khóa khác nhau.
A: Does every employee have to take both courses? B: Not everyone takes both. Each person chooses one required course, and anyone who wants to may take the other. A: So does the whole department take the same course together? B: No, each person can choose a different course.
The initial question combines a universal over employees with totality over the two courses. Không phải ai cũng học cả hai denies that this full two-course requirement reaches everyone; it does not say nobody takes both. Mỗi người chọn một khóa creates a per-person choice, and khác nhau explicitly allows the selected course to vary.
Common Mistakes
1. Confusing “not everyone” with “nobody”
❌ Không ai đồng ý với đề xuất.
Wrong if the intended meaning is ‘Not everyone agrees’: this says nobody agrees.
✅ Không phải ai cũng đồng ý với đề xuất.
Not everyone agrees with the proposal.
Không phải takes scope over ai cũng, preserving the possibility that some people agree.
2. Using mọi for a one-to-one allocation
❌ Mọi đội một nhiệm vụ.
Incorrect for ‘one task per team’: broad universal coverage does not by itself create a pairing.
✅ Mỗi đội một nhiệm vụ.
One task for each team.
Mỗi introduces the variable whose value pairs with one task.
3. Leaving a shared object ambiguous
❌ Mỗi nhóm đọc một bài báo.
Potentially unclear when one shared article is intended: this naturally permits a different article for each group.
✅ Tất cả các nhóm đều đọc cùng một bài báo.
All the groups read the same article.
Cùng một forces one identical referent across the groups.
4. Adding a copula to the comparative predicate
❌ Mọi sinh viên đều là cao hơn tôi.
Incorrect: là is not required before cao hơn.
✅ Mọi sinh viên đều cao hơn tôi.
Every student is taller than me.
The property word cao predicates directly, while hơn tôi supplies the degree relation and standard.
5. Translating than with an extra marker
❌ Mỗi mẫu đều bền hơn hơn mẫu cũ.
Incorrect: the second hơn is an English-driven duplicate.
✅ Mỗi mẫu đều bền hơn mẫu cũ.
Each model is more durable than the old model.
Vietnamese uses one hơn between the gradable predicate and its standard.
Key Takeaways
- Put negation outside ai cũng / mọi…đều / cả…đều for “not everyone/not all”; use không ai/không…nào for “nobody/none.”
- Use mỗi…một… or riêng for covarying allocations, and cùng một for one shared item.
- Cùng favors a collective event; đều distributes a predicate; từng individuates and often sequences.
- State changing comparison standards and superlative domains explicitly.
- Vietnamese encodes comparison and scope through predicate syntax, word order, and paired constructions rather than inflection.
Now practice Vietnamese
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Start learning Vietnamese →Related Topics
- Cả and TotalityB2 — Use cả to present a person, period, quantity, or group as a complete whole, and distinguish totality from distribution over its members.
- Comparatives with HơnA1 — Build Vietnamese ‘more/-er than’ comparisons by placing hơn after a gradable predicate rather than changing the adjective.
- Mỗi versus MọiB1 — Choose mỗi for member-by-member distribution and mọi for unrestricted or exhaustive coverage of a relevant class.
- Đều and Distributed PredicationB1 — Use đều after an established plural set to say that the same predicate holds of every relevant member.