The past tense casual form of iru and iku


In the question and similar ones:

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     Nihon e itta koto ga aru?
    
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How can one know whether `itta` is the past tense of `iku` or `iru`?




The past tense of 居る{いる} (iru) is not いった (itta), but いた (ita); thus, the past
tense of these words are not pronounced exactly the same. 「いった」has a slight
stop before the t sound (making the t sound a little lengthened),
whereas「いた」does not.




The past tense of 居る{いる} (iru) is not いった (itta), but いた (ita); thus, the past
tense of these words are not pronounced exactly the same. 「いった」has a slight
stop before the t sound (making the t sound a little lengthened),
whereas「いた」does not.

