| 1. | Base Form (Infinitive): | Complain |
| 2. | Simple Past: | Complained |
| 3. | Past Participle: | Complained |
| 4. | Present Participle: | Complaining |
| 5. | 3rd Person Singular: | Complains |
Complain past tense
| Complained |
| Complained is the past tense of the word complain. |
Complain past participle
| Complained |
| Complained is the past participle of the word complain. |
Complain verb forms V1 V2 V3 V4
| Infinitive | Past Simple | Past Participle | Present Participle |
|---|---|---|---|
| Complain | Complained | Complained | Complaining |
Conjugation of Complain
| Simple / Indefinite Present Tense |
| I complain to the teacher. |
| He/She/It complains to the teacher. |
| You/We/They complain to the teacher. |
| Simple Past Tense |
| I complained to the teacher. |
| He/She/It complained to the teacher. |
| You/We/They complained to the teacher. |
| Simple Future Tense |
| I will/shall complain to the teacher. |
| He/She/It will complain to the teacher. |
| You/We/They will/shall complain to the teacher. |
| Present Continuous Tense |
| I am complaining to the teacher. |
| He/She/It is complaining to the teacher. |
| You/We/They are complaining to the teacher. |
| Past Continuous Tense |
| I was complaining to the teacher. |
| He/She/It was complaining to the teacher. |
| You/We/They were complaining to the teacher. |
| Future Continuous Tense |
| I will be complaining to the teacher. |
| He/She/It will be complaining to the teacher. |
| You/We/They will be complaining to the teacher. |
| Present Perfect Tense |
| I have complained to the teacher. |
| He/She/It has complained to the teacher. |
| You/We/They have complained to the teacher. |
| Past Perfect Tense |
| I had complained to the teacher. |
| He/She/It had complained to the teacher. |
| You/We/They had complained to the teacher. |
| Future Perfect Tense |
| I will have complained to the teacher. |
| He/She/It will have complained to the teacher. |
| You/We/They will have complained to the teacher. |
| Present Perfect Continuous Tense |
| I have been complaining to the teacher. |
| He/She/It has been complaining to the teacher. |
| You/We/They have been complaining to the teacher. |
| Past Perfect Continuous Tense |
| I had been complaining to the teacher. |
| He/She/It had been complaining to the teacher. |
| You/We/They had been complaining to the teacher. |
| Future Perfect Continuous Tense |
| I will have been complaining to the teacher. |
| He/She/It will have been complaining to the teacher. |
| You/We/They will have been complaining to the teacher. |
