English verb conjugation
TO ALTER

Regular verb: alter - altered - altered

Indicative

Present	Present continuous	Preterite	Preterite continuous
I don't alter you don't alter she doesn't alter we don't alter you don't alter they don't alter	I'm not altering you aren't altering she isn't altering we aren't altering you aren't altering they aren't altering	I didn't alter you didn't alter she didn't alter we didn't alter you didn't alter they didn't alter	I wasn't altering you weren't altering she wasn't altering we weren't altering you weren't altering they weren't altering
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
I haven't altered you haven't altered she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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