chẳng những vs không những — 'Not Only... But Also' Constructions

Quick Answer

Both chẳng những and không những translate to "not only... but also" in English, used to connect two clauses where the second one adds more information, often surprising or significant. While largely interchangeable, chẳng những is often considered slightly more common and natural in everyday speech, whereas không những can sometimes carry a marginally more formal or emphatic tone, especially when emphasizing the unexpected nature of the second clause.

Comparison Table

Detailed Explanation

Both chẳng những and không những are crucial C1-level conjunctions for expressing the concept of "not only... but also" in Vietnamese. They serve to highlight that something possesses multiple qualities or that multiple actions occur, with the second point often adding to or intensifying the first.

Chẳng những

Chẳng những is perhaps the slightly more organic and frequently encountered of the two in everyday conversation. It's a robust connector that effortlessly links two clauses or phrases, signaling that the second part is an additional, often more significant or unexpected, piece of information. Think of it as a straightforward way to say "this, and surprisingly, also that." While perfectly suitable for formal contexts, its indigenous root for the negator 'chẳng' gives it a very natural feel across various registers.

Không những

Không những, while functionally identical in many scenarios, can sometimes carry a subtle layer of emphasis or formality. The 'không' component, originating from the Hán-Việt word '空' (meaning 'empty' or 'void'), can sometimes lend a slightly more formal or even more assertive tone to the negation. When you use không những, you might be subtly implying that the second point is not just an addition, but perhaps an even more remarkable or profound aspect than the first. However, it's vital to stress that this nuance is very subtle and in most daily contexts, they are interchangeable. For learners, mastering the common paired structures (like ...mà còn...) is more important than overthinking minute differences in everyday use.

The key takeaway is that both forms are widely accepted and understood. For C1 learners, developing an ear for how native speakers use them and experimenting with both in your own speech and writing will solidify your understanding.

Example Pairs

Common Patterns

The most common and crucial pattern for both chẳng những and không những is their pairing with mà còn (or sometimes just còn) in the second clause. This structure is almost always necessary to complete the "not only... but also" meaning.

Chẳng những A mà còn B: Not only A but also B Không những A mà còn B: Not only A but also B

Sometimes, other intensifiers like thậm chí (even) can follow mà còn or stand alone for extra emphasis on the second clause:

Chẳng những A mà còn thậm chí B: Not only A but even B Không những A mà còn thậm chí B: Not only A but even B

Common Mistakes

Mistake 1 — Omitting the connecting phrase 'mà còn'

A frequent error is forgetting to include a connector like 'mà còn' or 'còn' in the second part of the sentence, which makes the sentence incomplete and grammatically awkward.

❌ Chẳng những cô ấy thông minh, chăm chỉ.

✅ Chẳng những cô ấy thông minh mà còn chăm chỉ.

Why it's wrong and how to fix it: The phrase 'chẳng những' sets up an expectation for an additional, reinforcing point, which must be introduced by a phrase like 'mà còn' (but also) to connect the two ideas smoothly. Omitting it leaves the second clause hanging.

Mistake 2 — Using 'nhưng' instead of 'mà còn' for addition

While 'nhưng' means 'but', it's primarily used for contrast. In 'not only... but also' constructions, the second clause adds to, rather than contrasts with, the first. Therefore, 'mà còn' is the appropriate connector.

❌ Không những cô ấy nói tiếng Anh giỏi nhưng còn biết tiếng Trung.

✅ Không những cô ấy nói tiếng Anh giỏi mà còn biết tiếng Trung.

Why it's wrong and how to fix it: 'Nhưng' implies opposition or contrast. Here, knowing Chinese is an addition to, not a contradiction of, knowing English well. 'Mà còn' correctly expresses this additive relationship.

Mistake 3 — Incorrect word order for emphasis

Placing the subject or verb incorrectly after 'chẳng những/không những' can disrupt the flow. The structure generally follows: Subject + 'chẳng những/không những' + Verb/Adjective + ... 'mà còn' + Verb/Adjective + ...

❌ Chẳng những bài tập này khó mà còn thời gian làm ít.

✅ Chẳng những bài tập này khó mà còn có ít thời gian để làm.

Why it's wrong and how to fix it: The original sentence had an awkward structure in the second clause. The correct sentence explicitly states "there is little time to do" (có ít thời gian để làm), making the second part a complete thought that parallels the first.

Quick Quiz

Fill in the blank with chẳng những or không những:

1. Cửa hàng này _____ bán quần áo đẹp mà còn có nhiều chương trình khuyến mãi hấp dẫn.

Hint: Both words fit here perfectly, indicating interchangeability in a neutral context.

2. Vấn đề này _____ phức tạp về kỹ thuật mà còn đòi hỏi sự hiểu biết sâu sắc về văn hóa địa phương.

Hint: This sentence discusses a complex issue, and the second point adds a significant, perhaps unexpected, layer of difficulty. Consider which word might slightly emphasize this.

3. Anh ấy _____ đã hoàn thành dự án đúng hạn mà còn vượt chỉ tiêu đề ra.

Hint: The second part of the sentence shows an achievement that goes beyond the basic expectation.