Verbs Never Change Form

Vietnamese is an isolating language, which means words never change their shape. Because of this, there are absolutely zero irregular verbs to memorize!

In English, verbs change to show who is doing the action and when it happens. In Vietnamese, the verb đi (to go) stays exactly the same whether it means 'I go', 'she goes', or 'they went'. To change who is doing the action, you simply swap the subject pronoun (like tôi, cô ấy, or họ) while the verb remains untouched. However, keep in mind that choosing the correct pronoun (like You And I By Age) can be a social minefield that depends heavily on social context, such as age, gender, and status.

So, how do you know when an action happens? Vietnamese uses:

• Context: Often, the situation makes the timeframe obvious.
• Time words: Words like 'yesterday' or 'next year' set the time.
• Particles: Optional words like Completed Action (past), In Progress (ongoing), or Will (future) can be placed before the verb. You can also use About To for the immediate future, or Just Recently and Just Did for the immediate past. To show an action is fully completed, you can add Already at the end of the sentence. While you can pair them together as Already Done, native speakers usually drop đã and just use rồi at the end of the phrase in casual, everyday speech. In contrast, formal texts and careful speech often retain the full đã ... rồi structure.

Negating a verb is just as simple. Since verbs never conjugate, you place a negative word before the verb. It is crucial to choose the right one: use Not (general negation) for a flat negative or refusal, and Not Yet for something that hasn't happened up to now. When combining a tense particle and a negative word, the order is [Tense] + [Negative] + [Verb] (like sẽ không đi - will not go). Combinations like đang không (currently not doing) and sẽ không (will not do) are perfectly natural and common in everyday speech. While đã không is grammatically correct, standard for formal writing, and used for strong emphasis, native speakers often drop the đã in casual speech and just use không.

In declarative statements, chưa inherently carries a past-to-present meaning and stands alone—it cannot be combined with tense markers like đã (you cannot say tôi đã chưa ăn). A crucial rule to remember is that chưa (not yet) and rồi (already) are mutually exclusive. You cannot use them in the same sentence; for example, saying chưa ăn rồi is incorrect. Furthermore, đã không is perfectly natural and grammatically required in past conditional or counterfactual sentences (e.g., Nếu tôi biết, tôi đã không đi - If I had known, I would not have gone).

Just as you can negate a verb, you can also strongly affirm it. To emphasize that an action did happen or to contradict a negative statement, you can place có before the verb (e.g., Tôi có đi - I did go). This acts as the natural affirmative counterpart to the negative structures.

To talk about life experiences, you can use Have Ever Done for things you have experienced, and chưa từng for things you have never done. To ask if an action is completed, you use the question form Have You Yet? at the end of the sentence (e.g., Bạn ăn chưa? - Have you eaten yet?). To answer these questions, you simply reply with Rồi (Already) or Chưa (Not yet). You can also combine them in questions like Have You Ever? (e.g., Bạn đã ăn chưa?). To ask a standard present or future yes/no question, you can place không? at the end of the sentence (e.g., Bạn đi không? - Are you going? / Will you go?). For a more complete present or general question, use the frame [Subject] + có + [Verb] + không? (e.g., Bạn có đi không? - Do you go? / Are you going?), which uses the Yes-No Question pattern. For future questions, use the frame [Subject] + sẽ + [Verb] + không? (e.g., Bạn sẽ đi không? - Will you go?).

Crucially, Adjectives Work Like Verbs in Vietnamese. They are often called 'stative verbs' and follow the exact same rules: they never change form, they take the same tense markers, and they are negated the same way. Because of this, you do not use the 'to be' verb (To Be) to link a subject and an adjective. You simply say cô ấy đẹp (she is beautiful), not cô ấy là đẹp.

Because words do not change form, Vietnamese relies heavily on a strict Word Order Basics to make sentences clear.