to concern
Verbo regular: concern - concerned- concerned

Indicativo 	
Presente 	Presente continuo 	Pretérito 	Pretérito continuo 	
I concern
you concern
she concerns
we concern
you concern
they concern 	I'mconcerning
you'reconcerning
she'sconcerning
we'reconcerning
you'reconcerning
they'reconcerning	I concerned
you concerned
she concerned
we concerned
you concerned
they concerned	Iwasconcerning
youwereconcerning
shewasconcerning
wewereconcerning
youwereconcerning
theywereconcerning	
Presente perfecto 	Presente perfecto continuo 	Pluscuamperfecto 	Pluscuamperfecto continuo 	
I've concerned
you've concerned
she's concerned
we've concerned
you've concerned
they've concerned	I'vebeen concerning
you'vebeen concerning
she'sbeen concerning
we'vebeen concerning
you'vebeen concerning
they'vebeen concerning	I'd concerned
you'd concerned
she'd concerned
we'd concerned
you'd concerned
they'd concerned	I'd been concerning
you'd been concerning
she'd been concerning
we'd been concerning
you'd been concerning
they'd been concerning	
Futuro simple 	Futuro continuo 	Futuro perfecto 	Futuro perfecto contínuo 	
I'll concern
you'll concern
she'll concern
we'll concern
you'll concern
they'll concern 	I'll be concerning
you'll be concerning
she'll be concerning
we'll be concerning
you'll be concerning
they'll be concerning	I'll have concerned
you'll have concerned
she'll have concerned
we'll have concerned
you'll have concerned
they'll have concerned	I'll have been concerning
you'll have been concerning
she'll have been concerning
we'll have been concerning
you'll have been concerning
they'll have been concerning	

Condicional 	
Presente 	Presente continuo 	Passado 	Passado continuo 	
I'd concern
you'd concern
she'd concern
we'd concern
you'd concern
they'd concern 	I'd be concerning
you'd be concerning
she'd be concerning
we'd be concerning
you'd be concerning
they'd be concerning	I'd have concerned
you'd have concerned
she'd have concerned
we'd have concerned
you'd have concerned
they'd have concerned	I'd have been concerning
you'd have been concerning
she'd have been concerning
we'd have been concerning
you'd have been concerning
they'd have been concerning	

Infinitivo 	
Imperativo 	
Infinitivo 	 	Imperativo 	 	
to concern 	 	concern
Let's concern
concern 	 	

Participio 	
Presente 	Passado 	 	 	
concerning	concerned