Present participle; Past participle - arching - arched Present - arch - arch - arches - arch - arch - arch Past - arched - arched - arched - arched - arched - arched Future - will arch - will arch - will arch - will arch - will arch - will arch Present conditional - would arch - would arch - would arch - would arch - would arch - would arch Present Perfect - have arched - have arched - has arched - have arched - have arched - have arched Past Perfect - had arched - had arched - had arched - had arched - had arched - had arched Future Perfect - will have arched - will have arched - will have arched - will have arched - will have arched - will have arched Past conditional - would have arched - would have arched - would have arched - would have arched - would have arched - would have arched Imperative - - - arch - - - - - - - -