English verb conjugation
TO WARN

Regular verb: warn - warned - warned

Indicative

Present	Present continuous	Preterite	Preterite continuous
I warn you warn he warns we warn you warn they warn	I'm warning you're warning he's warning we're warning you're warning they're warning	I warned you warned he warned we warned you warned they warned	I was warning you were warning he was warning we were warning you were warning they were warning
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
I've warned you've warned he's warned we've warned you've warned they've warned	I've been warning you've been warning he's been warning we've been warning you've been warning they've been warning	I'd warned you'd warned he'd warned we'd warned you'd warned they'd warned	I'd been warning you'd been warning he'd been warning we'd been warning you'd been warning they'd been warning
Future	Future continuous	Future perfect	Future perfect continuous
I'll warn you'll warn he'll warn we'll warn you'll warn they'll warn	I'll be warning you'll be warning he'll be warning we'll be warning you'll be warning they'll be warning	I'll have warned you'll have warned he'll have warned we'll have warned you'll have warned they'll have warned	I'll have been warning you'll have been warning he'll have been warning we'll have been warning you'll have been warning they'll have been warning

Conditional

Present	Present continuous	Past	Past continuous
I'd warn you'd warn he'd warn we'd warn you'd warn they'd warn	I'd be warning you'd be warning he'd be warning we'd be warning you'd be warning they'd be warning	I'd have warned you'd have warned he'd have warned we'd have warned you'd have warned they'd have warned	I'd have been warning you'd have been warning he'd have been warning we'd have been warning you'd have been warning they'd have been warning

Infinitive

Imperative

Infinitive		Imperative
to warn		warn Let's warn warn

Participle

Present	Past
warning	warned