Learn Turkish: Herkesin nerede dua ettiğini gördük.

In Turkish, indirect questions use the same factive -diği clauses you already know! You just put the question word (nerede) before the verb in the clause. The whole sentence literally translates to 'We saw everyone's at-where praying.'

Why does 'everyone' take the genitive ending to become herkesin?

In a -diği clause, the subject of that specific action always takes the genitive case because it acts grammatically like the 'owner' of the action. Since everyone is doing the praying, herkes becomes herkesin (everyone's).

Can you break down the suffixes on ettiğini?

The root is dua et- (pray). We add -tiğ (the -diği factive suffix for past/present actions). Then comes -i (3rd person singular possessive, matching herkesin). Finally, we add the buffer -n- and the accusative case -i, because this entire clause is the direct object of what we saw (gördük).

How do we know they prayed in the past instead of the future?