to alter
Regular verb: alter - altered- altered

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

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I wouldn't alter
you wouldn't alter
he wouldn't alter
we wouldn't alter
you wouldn't alter
they wouldn't alter 	I wouldn't be altering
you wouldn't be altering
he wouldn't be altering
we wouldn't be altering
you wouldn't be altering
they wouldn't be altering	I wouldn't have altered
you wouldn't have altered
he wouldn't have altered
we wouldn't have altered
you wouldn't have altered
they wouldn't have altered	I wouldn't have been altering
you wouldn't have been altering
he wouldn't have been altering
we wouldn't have been altering
you wouldn't have been altering
they wouldn't have been altering	

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

Participle 	
Present 	Past 	 	 	
altering	altered