He talked as if he had known ... => In fact he didn't/ hadn't known ...

[wotcha]

I've shortened and briefed my question.

1. He talked as if he were rich.

2. He talked as if he had been rich.

3. He talks as if he had been rich.


Which one actually mean 'he wasn't rich' among three sentence?

[philo2009]

I've shortened and briefed my question.

1. He talked as if he were rich.

2. He talked as if he had been rich.

3. He talks as if he had been rich.


Which one actually mean 'he wasn't rich' among three sentence?

None of them definitively. However 1 and 2 suggest that the speaker considers it likely that he was not (of the two, 1 being the more naturally phrased as regards contemporary usage).