to toughen
Regular verb: toughen - toughened- toughened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I toughen
you toughen
he toughens
we toughen
you toughen
they toughen 	I'mtoughening
you'retoughening
he'stoughening
we'retoughening
you'retoughening
they'retoughening	I toughened
you toughened
he toughened
we toughened
you toughened
they toughened	Iwastoughening
youweretoughening
hewastoughening
weweretoughening
youweretoughening
theyweretoughening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've toughened
you've toughened
he's toughened
we've toughened
you've toughened
they've toughened	I'vebeen toughening
you'vebeen toughening
he'sbeen toughening
we'vebeen toughening
you'vebeen toughening
they'vebeen toughening	I'd toughened
you'd toughened
he'd toughened
we'd toughened
you'd toughened
they'd toughened	I'd been toughening
you'd been toughening
he'd been toughening
we'd been toughening
you'd been toughening
they'd been toughening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll toughen
you'll toughen
he'll toughen
we'll toughen
you'll toughen
they'll toughen 	I'll be toughening
you'll be toughening
he'll be toughening
we'll be toughening
you'll be toughening
they'll be toughening	I'll have toughened
you'll have toughened
he'll have toughened
we'll have toughened
you'll have toughened
they'll have toughened	I'll have been toughening
you'll have been toughening
he'll have been toughening
we'll have been toughening
you'll have been toughening
they'll have been toughening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd toughen
you'd toughen
he'd toughen
we'd toughen
you'd toughen
they'd toughen 	I'd be toughening
you'd be toughening
he'd be toughening
we'd be toughening
you'd be toughening
they'd be toughening	I'd have toughened
you'd have toughened
he'd have toughened
we'd have toughened
you'd have toughened
they'd have toughened	I'd have been toughening
you'd have been toughening
he'd have been toughening
we'd have been toughening
you'd have been toughening
they'd have been toughening	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to toughen 	 	toughen
Let's toughen
toughen 	 	

Participle 	
Present 	Past 	 	 	
toughening	toughened