Topic + thì + Comment
Marking the Topic with Thì
Thì is a topic marker that separates what you are talking about (the topic) from what you want to say about it (the comment).
How It Works
Vietnamese is a topic-prominent language, meaning sentences are frequently built around a "Topic + Comment" structure rather than a strict "Subject + Verb" structure. The particle thì acts as a boundary, separating the topic from the comment.
1. What can be a topic?
Unlike English, the topic marked by thì can be almost anything:
- A noun or pronoun: Tôi thì... (As for me...)
- A time or place: Hôm nay thì... (As for today...)
- An object moved to the front: Sách này thì... (As for this book...) - see Putting The Object First.
- A bare verb: Nói thì... (As for talking...)
- A full clause: Nếu trời mưa thì... (If it rains, [then]...) - see If ... Then ....
2. Thì is NOT a verb
A very common misconception is that thì is the verb "to be" used before adjectives. This is incorrect. Vietnamese adjectives function as verbs on their own (see Adjectives Work Like Verbs). In the sentence Cô ấy thì đẹp, thì simply marks "Cô ấy" as the topic ("As for her, [she is] beautiful"). It is a grammatical particle, not a copula like To Be. In fact, inserting thì before an adjective almost always signals emphasis or a pending contrast (e.g., Cô ấy thì đẹp, nhưng lười - "As for her, she is beautiful, but lazy").
3. Contrast and Optionality
Thì is highly useful for drawing contrasts between two subjects, often paired with Whereas (e.g., "I like X, whereas he thì likes Y"). However, in everyday speech, thì is frequently optional. A sentence like Sách này tôi đọc rồi is perfectly natural and grammatically complete even without thì.
Examples (5)
- Sách này thì tôi đọc rồi.
As for this book, I have read it already.
Word by Word: Book this [topic] I read already.
The object (this book) is moved to the front to become the topic, marked by thì.
- Hôm nay thì em rảnh.
As for today, I am free.
Word by Word: Today [topic] I free.
A time phrase acts as the topic of the sentence.
- Tôi thích cà phê, còn anh ấy thì thích trà.
I like coffee, but as for him, he likes tea.
Word by Word: I like coffee, whereas he [topic] like tea.
Thì is used here to establish a clear contrast between the two subjects.
- Nói thì bà Ba nói rất nhiều.
When it comes to talking, Mrs. Ba talks a lot.
Word by Word: Talk [topic] Mrs. Ba talk very much.
A bare verb (nói) is used directly as the topic without needing to be changed into a noun.
- Nếu trời mưa thì tôi sẽ ở nhà.
If it rains, then I will stay home.
Word by Word: If sky rain [topic] I will stay home.
An entire clause (if it rains) acts as the topic, setting the condition for the comment.
Common Mistakes
Thinking 'thì' is the verb 'to be' and is grammatically required before adjectives.
Tôi thì bận.Tôi bận.Because English requires 'am/is/are' before adjectives, learners often insert 'thì' into every sentence with an adjective, thinking it makes the sentence complete. While 'Tôi thì bận' is a valid sentence meaning 'As for me, I am busy', 'thì' is not a verb and is not required. 'Tôi bận' is the standard, neutral way to say 'I am busy'.
Failing to recognize that a bare verb can be a topic.
Việc học thì tôi thích.Học thì tôi thích.Learners often try to turn verbs into nouns (like English gerunds, e.g., 'studying') by adding words like 'việc' before using them as a topic. In Vietnamese, you can use the base verb directly as the topic without any morphological changes.
How It Connects
Learn This First
To use 'thì' as a topic marker, you first need to understand basic Vietnamese word order and how adjectives function as predicates. It is also helpful to be familiar with 'thì' in its conditional sense, as it serves a similar function of separating a premise or topic from the following statement.
Related Patterns
- làTo Be
Learners often confuse 'thì' with 'là'. 'Là' is the actual verb 'to be' used to link two nouns, whereas 'thì' is a particle used to mark a topic.
Level 1 - còn (đối lập)Whereas
'Còn' (whereas/as for) is frequently paired with 'thì' in the second half of a sentence to contrast two different topics.
Level 2 - Adjectives Work Like Verbs
Understanding that Vietnamese adjectives act like verbs helps clarify why 'thì' is not acting as a 'to be' verb when placed before an adjective.
Foundations - Putting The Object First
When an object is moved to the front of a sentence to become the focus, 'thì' is often used to mark it as the new topic.
Level 4
Learn Next
Patterns that build on this one.
- còn ... thì ...As forLevel 3
- miễn làAs Long asLevel 3
- nếu không thìOtherwiseLevel 3
- trong khiWhileLevel 3
- vềAbout / as forLevel 3
- Naming A Topic Then CommentingLevel 4
- lỡ ... thì ...What if It Goes WrongLevel 4
- nói chungGenerally SpeakingLevel 4
And 3 more in the full list.
Words in This Pattern
Practice Topic + thì + Comment in Bubblegum
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