Thai grammar is incredibly straightforward because verbs never change their form.

You don’t need to memorize complex verb conjugations to express the past or future tense.

Instead, Thai uses simple time words and tense markers to indicate when an action happens.

This logical system makes learning how to talk about the past and future much easier than in many other languages.

How Thai verbs work

In English, verbs change completely depending on the timeline.

For example, the word “eat” becomes “ate” in the past and “will eat” in the future.

In Thai, the base verb for “to eat” is always กิน (gin).

It never changes spelling or pronunciation regardless of when the action takes place.

This grammatical rule applies across all Thai regional dialects, including Northern Thai and Isaan.

You simply add a time word or a helper word to the sentence to show the timeline.

Expressing the past tense in Thai

There are two main ways to talk about the past in Thai.

The most common method is adding a specific time word to your sentence.

Time words usually go at either the very beginning or the very end of the sentence.

Here are the most common past time words you need to know:

Here’s an example of a past time word in action.

The second method is using past tense markers.

The word แล้ว (láew) translates to “already” and sits at the very end of the sentence.

This word confirms that an action has been completed.

Another useful marker is เคย (koey), which translates to “used to” or “have experienced”.

You place เคย right before the main verb.

The word ได้ (dâai) can also be placed before a verb to emphasize that an action did indeed happen.

Expressing the future tense in Thai

Talking about the future follows the exact same logic.

You can use future time words to establish when the event will happen.

Here are the most common future time words in Thai:

Here’s how you use a future time word in a sentence.

To make a future statement even clearer, Thai uses a specific future tense marker.

The word จะ (jà) translates directly to “will” or “shall”.

You place จะ immediately before the main verb.

Combining tense markers with time words

Native Thai speakers frequently use both time words and tense markers in the same sentence.

This provides complete clarity about exactly when an event occurred or will occur.

In daily conversation, context is often enough to understand the timeline.

If you’re already talking about a trip you took last year, you don’t need to keep repeating past tense markers.

You just use the base form of the verbs throughout the rest of your story.