I don't alter you don't alter he doesn't alter we don't alter you don't alter they don't alter
Present continuous
I'm not altering you aren't altering he isn't altering we aren't altering you aren't altering they aren't altering
Preterite
I didn't alter you didn't alter he didn't alter we didn't alter you didn't alter they didn't alter
Preterite continuous
I wasn't altering you weren't altering he wasn't altering we weren't altering you weren't altering they weren't altering
Present perfect
I haven't altered you haven't altered he hasn't altered we haven't altered you haven't altered they haven't altered
Present perfect continuous
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
Pluperfect
I hadn't altered you hadn't altered he hadn't altered we hadn't altered you hadn't altered they hadn't altered
Pluperfect continuous
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
I won't alter you won't alter he won't alter we won't alter you won't alter they won't alter
Future continuous
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
Future perfect
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
Future perfect continuous
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
I wouldn't alter you wouldn't alter he wouldn't alter we wouldn't alter you wouldn't alter they wouldn't alter
Present continuous
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
Past
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
Past continuous
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