to strengthen
Verbo regular: strengthen - strengthened- strengthened

Indicativo 	
Presente 	Presente contínuo 	Pretérito 	Preterito contínuo 	
I strengthen
you strengthen
he strengthens
we strengthen
you strengthen
they strengthen 	I'mstrengthening
you'restrengthening
he'sstrengthening
we'restrengthening
you'restrengthening
they'restrengthening	I strengthened
you strengthened
he strengthened
we strengthened
you strengthened
they strengthened	Iwasstrengthening
youwerestrengthening
hewasstrengthening
wewerestrengthening
youwerestrengthening
theywerestrengthening	
Presente perfeito 	Presente perfeito contínuo 	Mais perfeito 	Contínuo mais perfeito 	
I've strengthened
you've strengthened
he's strengthened
we've strengthened
you've strengthened
they've strengthened	I'vebeen strengthening
you'vebeen strengthening
he'sbeen strengthening
we'vebeen strengthening
you'vebeen strengthening
they'vebeen strengthening	I'd strengthened
you'd strengthened
he'd strengthened
we'd strengthened
you'd strengthened
they'd strengthened	I'd been strengthening
you'd been strengthening
he'd been strengthening
we'd been strengthening
you'd been strengthening
they'd been strengthening	
Futuro 	Futuro contínuo 	futuro perfeito 	futuro perfeito contínuo 	
I'll strengthen
you'll strengthen
he'll strengthen
we'll strengthen
you'll strengthen
they'll strengthen 	I'll be strengthening
you'll be strengthening
he'll be strengthening
we'll be strengthening
you'll be strengthening
they'll be strengthening	I'll have strengthened
you'll have strengthened
he'll have strengthened
we'll have strengthened
you'll have strengthened
they'll have strengthened	I'll have been strengthening
you'll have been strengthening
he'll have been strengthening
we'll have been strengthening
you'll have been strengthening
they'll have been strengthening	

Condicional 	
Presente 	Presente contínuo 	Passado 	Passado contínuo 	
I'd strengthen
you'd strengthen
he'd strengthen
we'd strengthen
you'd strengthen
they'd strengthen 	I'd be strengthening
you'd be strengthening
he'd be strengthening
we'd be strengthening
you'd be strengthening
they'd be strengthening	I'd have strengthened
you'd have strengthened
he'd have strengthened
we'd have strengthened
you'd have strengthened
they'd have strengthened	I'd have been strengthening
you'd have been strengthening
he'd have been strengthening
we'd have been strengthening
you'd have been strengthening
they'd have been strengthening	

Infinitivo 	
Imperativo 	
Infinitivo 	 	Imperativo 	 	
to strengthen 	 	strengthen
Let's strengthen
strengthen 	 	

Particípio 	
Presente 	Passado 	 	 	
strengthening	strengthened