Expressing Past Experiences with ことがある

The Basic Form

The literal translation of is "An abstract thing/matter exists" or "There is a fact/incident". In japanese you use this phrase when you want to say that you have the experience of doing something—like "I have been to Japan" or "I have eaten sushi"—you use the grammar pattern

[Verb in た-Form] + ことがある

To form this, you must conjugate the verb into its plain past tense (also known as the -form), and then add .

Verb (た-form) + ことがある

The polite equivalent is . If you need a refresher on how to conjugate verbs into the past tense, see our guide on Introduction to Japanese Tenses.

Conjugation Examples

Here is how some of the most common verbs conjugate into this pattern. Notice that the verb itself always stays in the past tense, regardless of when you are talking about the experience.

Having Never Done Something (ことがない)

To express that you have never experienced something, you simply change the ending from to (or for politeness). The verb preceding it remains in the た-form.

[Verb in た-form] + ことがない

ことがある vs ている

In English, the word "have" is used for both life experiences ("I have been to Japan") and present perfect states ("He has gone to Japan"). In Japanese, these are two entirely different grammar points.

• is used strictly for accumulated life experiences. It means the action happened at some point in the past, and you hold that experience.
• indicates an ongoing state or the result of a recent action.

Observe the difference:

Time Expressions and Frequency

You will frequently see paired with adverbs that specify how many times an experience occurred.

Expressing "First Time" (初めて)

A common point of confusion is how to say "This is my first time doing X." You generally do not say 「初めて〜たことがある」 because ことがある implies a preexisting experience. Instead, native speakers contrast their lack of experience (ことがない) with the fact that they are doing it for the first time ().

Casual Speech Abbreviation

In casual conversations, particles are frequently dropped. When speaking casually, the particle が is often omitted, shortening the phrase to ことある or ことない.

Past Experiences: ことがなかった

What if you want to say "I had never done it (until that moment)"? In this case, you change the end of the phrase into the past tense: (casual) or (polite).

This is highly useful when narrating stories or describing how your experiences changed over time. You can use the Connect ideas with the て-Form to seamlessly connect these past realizations to other actions.

Study Tips

Learning how to express your past experiences expands your conversational ability tremendously.

• Keep in mind that is reserved for notable life experiences. You wouldn't use it for mundane, everyday tasks like "I have the experience of brushing my teeth this morning." Instead, you would simply use the regular past tense ().
• Don't worry about memorizing every time expression right away. Focus on recognizing [Verb] + たことがある as a block that means "experience."
• As you spend more time engaging with the language (see A Practical Guide to Language Immersion for strategies), you will naturally develop a feel for when to use ことがある versus the simple past tense.