[verb]Used as a 補助動詞(hojo dōshi), after a verb in the て(-te)conjunctive form. Note that ている(-te iru) colloquially shortens to てる(-teru), ていた(-te ita) colloquially shortens to てた(-teta), etc.
[verb]Indicates a progressive or continuative tense: to be doing
[verb]Indicates a regular, repetitive action.
[verb]Indicates a state resulting from the action.
[verb](of animate objects) to exist, to be, to have
[verb](after a transitive verb in the て conjunctive form) to be (doing): indicates a progressive or continuous sense; the verb ending -ておる(-te oru) is often contracted to とる(-toru)
[verb](Chūgoku,Shikoku,Kyūshū, after a verb in the conjunctive form) to be (doing); a continuous sense; often transformed to よる(yoru)
(This term, 居る, is an alternative spelling of the above term.)