to concern
Regular verb: concern - concerned- concerned

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I don't concern
you don't concern
he doesn't concern
we don't concern
you don't concern
they don't concern 	I'mnot concerning
youaren't concerning
heisn't concerning
wearen't concerning
youaren't concerning
theyaren't concerning	I didn't concern
you didn't concern
he didn't concern
we didn't concern
you didn't concern
they didn't concern 	Iwasn't concerning
youweren't concerning
hewasn't concerning
weweren't concerning
youweren't concerning
theyweren't concerning	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I haven't concerned
you haven't concerned
he hasn't concerned
we haven't concerned
you haven't concerned
they haven't concerned	I haven't  been concerning
you haven't  been concerning
he hasn't  been concerning
we haven't  been concerning
you haven't  been concerning
they haven't  been concerning	I hadn't concerned
you hadn't concerned
he hadn't concerned
we hadn't concerned
you hadn't concerned
they hadn't concerned	I hadn't been concerning
you hadn't been concerning
he hadn't been concerning
we hadn't been concerning
you hadn't been concerning
they hadn't been concerning	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I won't concern
you won't concern
he won't concern
we won't concern
you won't concern
they won't concern 	I won't be concerning
you won't be concerning
he won't be concerning
we won't be concerning
you won't be concerning
they won't be concerning	I won't have concerned
you won't have concerned
he won't have concerned
we won't have concerned
you won't have concerned
they won't have concerned	I won't have been concerning
you won't have been concerning
he won't have been concerning
we won't have been concerning
you won't have been concerning
they won't have been concerning	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I wouldn't concern
you wouldn't concern
he wouldn't concern
we wouldn't concern
you wouldn't concern
they wouldn't concern 	I wouldn't be concerning
you wouldn't be concerning
he wouldn't be concerning
we wouldn't be concerning
you wouldn't be concerning
they wouldn't be concerning	I wouldn't have concerned
you wouldn't have concerned
he wouldn't have concerned
we wouldn't have concerned
you wouldn't have concerned
they wouldn't have concerned	I wouldn't have been concerning
you wouldn't have been concerning
he wouldn't have been concerning
we wouldn't have been concerning
you wouldn't have been concerning
they wouldn't have been concerning	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to concern 	 	do not concern
Let's not concern
do not concern 	 	

Participle 	
Present 	Past 	 	 	
concerning	concerned