| Simple present |
don't degenerate |
don't degenerate |
doesn't degenerate |
don't degenerate |
don't degenerate |
don't degenerate |
| Present continuous |
am not degenerating |
are not degenerating |
is not degenerating |
are not degenerating |
are not degenerating |
are not degenerating |
| Simple past |
didn't degenerate |
didn't degenerate |
didn't degenerate |
didn't degenerate |
didn't degenerate |
didn't degenerate |
| Past continuous |
was not degenerating |
were not degenerating |
was not degenerating |
were not degenerating |
were not degenerating |
were not degenerating |
| Simple future |
won't degenerate |
won't degenerate |
won't degenerate |
won't degenerate |
won't degenerate |
won't degenerate |
| Future continuous |
will not be degenerating |
will not be degenerating |
will not be degenerating |
will not be degenerating |
will not be degenerating |
will not be degenerating |
| Present perfect |
have not degenerated |
have not degenerated |
has not degenerated |
have not degenerated |
have not degenerated |
have not degenerated |
| Present perfect continuous |
have not been degenerating |
have not been degenerating |
has not been degenerating |
have not been degenerating |
have not been degenerating |
have not been degenerating |
| Past perfect |
had not degenerated |
had not degenerated |
had not degenerated |
had not degenerated |
had not degenerated |
had not degenerated |
| Past perfect continuous |
had not been degenerating |
had not been degenerating |
had not been degenerating |
had not been degenerating |
had not been degenerating |
had not been degenerating |
| Future perfect |
will not have degenerated |
will not have degenerated |
will not have degenerated |
will not have degenerated |
will not have degenerated |
will not have degenerated |
| Future perfect continuous |
will not have been degenerating |
will not have been degenerating |
will not have been degenerating |
will not have been degenerating |
will not have been degenerating |
will not have been degenerating |