| Present Tense | Past Tense | Future Tense |
|---|---|---|
| I contaminate | I contaminated | I shall/will contaminate |
| We contaminate | We contaminated | We shall/will contaminate |
| You contaminate | You contaminated | You will contaminate |
| He contaminates | He contaminated | He will contaminate |
| She contaminates | She contaminated | She will contaminate |
| It contaminates | It contaminated | It will contaminate |
| They contaminate | They contaminated | They will contaminate |
| Present Continuous | Past Continuous | Future Continuous |
|---|---|---|
| I am contaminating | I was contaminating | I shall/will be contaminating |
| We are contaminating | We were contaminating | We shall/will be contaminating |
| You are contaminating | You were contaminating | You will be contaminating |
| He is contaminating | He was contaminating | He will be contaminating |
| She is contaminating | She was contaminating | She will be contaminating |
| It is contaminating | It was contaminating | It will be contaminating |
| They are contaminating | They were contaminating | They will be contaminating |
| Present Perfect | Past Perfect | Future Perfect |
|---|---|---|
| I have Contaminated | I had Contaminated | I shall/will have Contaminated |
| We have Contaminated | We had Contaminated | We shall/will have Contaminated |
| You have Contaminated | You had Contaminated | You will have Contaminated |
| He has Contaminated | He had Contaminated | He will have Contaminated |
| She has Contaminated | She had Contaminated | She will have Contaminated |
| It has Contaminated | It had Contaminated | It will have Contaminated |
| They have Contaminated | They had Contaminated | They will have Contaminated |
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous |
|---|---|---|
| I have been contaminating | I had been contaminating | I shall/will have been contaminating |
| We have been contaminating | We had been contaminating | We shall/will have been contaminating |
| You have been contaminating | You had been contaminating | You will have been contaminating |
| He has been contaminating | He had been contaminating | He will have been contaminating |
| She has been contaminating | She had been contaminating | She will have been contaminating |
| It has been contaminating | It had been contaminating | It will have been contaminating |
| They have been contaminating | They had been contaminating | They will have been contaminating |