The third conditional

1. Third conditional

"If I would have known about the party, I would have gone to it."

This is INCORRECT, although commonly used, especially in American English.

The correct form is:

If + had + past participle, would + have + past participle

* "If I had known about the party, I would have gone."

This is CORRECT.

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if you can tell me what it is and how it relates to the post

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which can be redeemed for a feeling of self satisfaction.