It was I who was wrong VERSUS It is I who was wrong

[Tung Quoc]

Dear teachers,

What is the difference btw:

1. It was I who was wrong.
2. It is I who was wrong.

Thanks
Quoc

[Mister Micawber]

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Just as it seems: the first sentence refers to the speaker in the past situation; the second refers to the speaker at the moment.
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Native English teacher at Mister Micawber's