Translation guide
Expressing that something happens a single time, not repeatedly.
The speaker wants to say that an action or event happens just one time, not multiple times.
The most common and natural way to say 'only once'. 一度 means 'one time' and だけ means 'only'.
I have met him only once.
The speaker wants to express a condition: if something occurs a single time, then a certain result follows.
Used to say 'if (you) even once...'. でも adds the meaning of 'even'. The 〜たら is the conditional form.
The speaker wants to say they have done something at least one time in their life, or recommend trying something at least once.
Standard way to say 'have done ~ at least once'. 一度は implies 'at least once' or 'once in one's life'.
This opportunity comes only once.
Similar to 一度だけ, but 一回 is more casual and often used for counting occurrences. Interchangeable in many contexts.
I saw that movie only once.
Emphasizes that it was just a single time, often with a nuance of 'merely' or 'no more than'. More emotional or emphatic.
Don't give up after just one failure.
If you lie even once, you lose trust.
Similar to 〜たら, but using the 〜ば conditional. Slightly more formal or written.
If you break a promise even once, you won't be trusted anymore.
Have you climbed Mt. Fuji at least once?
Used to suggest trying something at least once. 〜てみる means 'try doing'.
Please try sake at least once.