ἄφες ἡμῖν τὰ ὀφειλήματα ἡμῶν → forgive us our trespasses
Interrogative: P. and V. τίς;
Indirect: P. and V. ὅστις.
Relative: P. and V. ὅς, ὅσπερ, ὅστις, V. ὅστε (rare in V. only used in P. in certain phrases such as ἐφ' ᾧτε).