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