to intervene
Regular verb: intervene - intervened- intervened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I don't intervene
you don't intervene
she doesn't intervene
we don't intervene
you don't intervene
they don't intervene 	I'mnot intervening
youaren't intervening
sheisn't intervening
wearen't intervening
youaren't intervening
theyaren't intervening	I didn't intervene
you didn't intervene
she didn't intervene
we didn't intervene
you didn't intervene
they didn't intervene 	Iwasn't intervening
youweren't intervening
shewasn't intervening
weweren't intervening
youweren't intervening
theyweren't intervening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I haven't intervened
you haven't intervened
she hasn't intervened
we haven't intervened
you haven't intervened
they haven't intervened	I haven't  been intervening
you haven't  been intervening
she hasn't  been intervening
we haven't  been intervening
you haven't  been intervening
they haven't  been intervening	I hadn't intervened
you hadn't intervened
she hadn't intervened
we hadn't intervened
you hadn't intervened
they hadn't intervened	I hadn't been intervening
you hadn't been intervening
she hadn't been intervening
we hadn't been intervening
you hadn't been intervening
they hadn't been intervening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I won't intervene
you won't intervene
she won't intervene
we won't intervene
you won't intervene
they won't intervene 	I won't be intervening
you won't be intervening
she won't be intervening
we won't be intervening
you won't be intervening
they won't be intervening	I won't have intervened
you won't have intervened
she won't have intervened
we won't have intervened
you won't have intervened
they won't have intervened	I won't have been intervening
you won't have been intervening
she won't have been intervening
we won't have been intervening
you won't have been intervening
they won't have been intervening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I wouldn't intervene
you wouldn't intervene
she wouldn't intervene
we wouldn't intervene
you wouldn't intervene
they wouldn't intervene 	I wouldn't be intervening
you wouldn't be intervening
she wouldn't be intervening
we wouldn't be intervening
you wouldn't be intervening
they wouldn't be intervening	I wouldn't have intervened
you wouldn't have intervened
she wouldn't have intervened
we wouldn't have intervened
you wouldn't have intervened
they wouldn't have intervened	I wouldn't have been intervening
you wouldn't have been intervening
she wouldn't have been intervening
we wouldn't have been intervening
you wouldn't have been intervening
they wouldn't have been intervening	

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

Participle 	
Present 	Past 	 	 	
intervening	intervened