to underuse
Regular verb: underuse - underused- underused

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I underuse
you underuse
he underuses
we underuse
you underuse
they underuse 	I'munderusing
you'reunderusing
he'sunderusing
we'reunderusing
you'reunderusing
they'reunderusing	I underused
you underused
he underused
we underused
you underused
they underused	Iwasunderusing
youwereunderusing
hewasunderusing
wewereunderusing
youwereunderusing
theywereunderusing	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've underused
you've underused
he's underused
we've underused
you've underused
they've underused	I'vebeen underusing
you'vebeen underusing
he'sbeen underusing
we'vebeen underusing
you'vebeen underusing
they'vebeen underusing	I'd underused
you'd underused
he'd underused
we'd underused
you'd underused
they'd underused	I'd been underusing
you'd been underusing
he'd been underusing
we'd been underusing
you'd been underusing
they'd been underusing	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll underuse
you'll underuse
he'll underuse
we'll underuse
you'll underuse
they'll underuse 	I'll be underusing
you'll be underusing
he'll be underusing
we'll be underusing
you'll be underusing
they'll be underusing	I'll have underused
you'll have underused
he'll have underused
we'll have underused
you'll have underused
they'll have underused	I'll have been underusing
you'll have been underusing
he'll have been underusing
we'll have been underusing
you'll have been underusing
they'll have been underusing	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd underuse
you'd underuse
he'd underuse
we'd underuse
you'd underuse
they'd underuse 	I'd be underusing
you'd be underusing
he'd be underusing
we'd be underusing
you'd be underusing
they'd be underusing	I'd have underused
you'd have underused
he'd have underused
we'd have underused
you'd have underused
they'd have underused	I'd have been underusing
you'd have been underusing
he'd have been underusing
we'd have been underusing
you'd have been underusing
they'd have been underusing	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to underuse 	 	underuse
Let's underuse
underuse 	 	

Participle 	
Present 	Past 	 	 	
underusing	underused