| 1. | Base Form (Infinitive): | Impair |
| 2. | Simple Past: | Impaired |
| 3. | Past Participle: | Impaired |
| 4. | Present Participle: | Impairing |
| 5. | 3rd Person Singular: | Impairs |

Impair past tense
| Impaired |
| Impaired is the past tense of the word impair. |
Impair past participle
| Impaired |
| Impaired is the past participle of the word impair. |
Impair verb forms V1 V2 V3 V4
| Infinitive | Past Simple | Past Participle | Present Participle |
|---|---|---|---|
| Impair | Impaired | Impaired | Impairing |
Conjugation of Impair
| Simple / Indefinite Present Tense |
| I impair. |
| He/She/It impairs. |
| You/We/They impair. |
| Simple Past Tense |
| I impaired. |
| He/She/It impaired. |
| You/We/They impaired. |
| Simple Future Tense |
| I will/shall impair. |
| He/She/It will impair. |
| You/We/They will/shall impair. |
| Present Continuous Tense |
| I am impairing. |
| He/She/It is impairing. |
| You/We/They are impairing. |
| Past Continuous Tense |
| I was impairing. |
| He/She/It was impairing. |
| You/We/They were impairing. |
| Future Continuous Tense |
| I will be impairing. |
| He/She/It will be impairing. |
| You/We/They will be impairing. |
| Present Perfect Tense |
| I have impaired. |
| He/She/It has impaired. |
| You/We/They have impaired. |
| Past Perfect Tense |
| I had impaired. |
| He/She/It had impaired. |
| You/We/They had impaired. |
| Future Perfect Tense |
| I will have impaired. |
| He/She/It will have impaired. |
| You/We/They will have impaired. |
| Present Perfect Continuous Tense |
| I have been impairing. |
| He/She/It has been impairing. |
| You/We/They have been impairing. |
| Past Perfect Continuous Tense |
| I had been impairing. |
| He/She/It had been impairing. |
| You/We/They had been impairing. |
| Future Perfect Continuous Tense |
| I will have been impairing. |
| He/She/It will have been impairing. |
| You/We/They will have been impairing. |