| INDICATIVE |  | 
| Present |  | 
| I collaborate You collaborate
 He/She/It collaborates
 We collaborate
 You collaborate
 They collaborate
 
 |  | 
| Imperfect |  | 
| I was collaborating You were collaborating
 He/She/It was collaborating
 We were collaborating
 You were collaborating
 They were collaborating
 
 |  | 
| Perfect |  | 
| I collaborated You collaborated
 He/She/It collaborated
 We collaborated
 You collaborated
 They collaborated
 
 |  | 
| Perfect |  | 
| I have collaborated You have collaborated
 He/She/It has collaborated
 We have collaborated
 You have collaborated
 They have collaborated
 
 |  | 
| PlusPerfect |  | 
| I had collaborated You had collaborated
 He/She/It had collaborated
 We had collaborated
 You had collaborated
 They had collaborated
 
 |  | 
| Plusperfect |  | 
| I had collaborated You had collaborated
 He/She/It had collaborated
 We had collaborated
 You had collaborated
 They had collaborated
 
 |  | 
| Future |  | 
| I will collaborate You will collaborate
 He/She/It will collaborate
 We will collaborate
 You will collaborate
 They will collaborate
 
 |  | 
| Future perfect |  | 
| I will have collaborated You will have collaborated
 He/She/It will have collaborated
 We will have collaborated
 You will have collaborated
 They will have collaborated
 
 |  | 
| SUBJUNTIVE |  | 
| Present |  | 
| I (that )may collaborate You (that )may collaborate
 He/She/It (that )may collaborate
 We (that )may collaborate
 You (that )may collaborate
 They (that )may collaborate
 
 |  | 
| Imperfect |  | 
| I (that )might collaborate You (that )might collaborate
 He/She/It (that )might collaborate
 We (that )might collaborate
 You (that )might collaborate
 They (that )might collaborate
 
 |  | 
| Perfect |  | 
| I (whether) collaborated You (whether) collaborated
 He/She/It (whether) collaborated
 We (whether) collaborated
 You (whether) collaborated
 They (whether) collaborated
 
 |  | 
| Pluperfect |  | 
| I (whether) had collaborated You (whether) had collaborated
 He/She/It (whether) had collaborated
 We (whether) had collaborated
 You (whether) had collaborated
 They (whether) had collaborated
 
 |  | 
| CONDITIONAL |  | 
| Present |  | 
| I would collaborate You would collaborate
 He/She/It would collaborate
 We would collaborate
 You would collaborate
 They would collaborate
 
 |  | 
| Perfect |  | 
| I would have collaborated You would have collaborated
 He/She/It would have collaborated
 We would have collaborated
 You would have collaborated
 They would have collaborated
 
 |  | 
| IMPERATIVE |  | 
| Present |  | 
| let me collaborate collaborate
 let him collaborate
 let us collaborate
 collaborate
 let them collaborate
 
 |  | 
| PARTICIPLE |  | 
| Present |  | 
| collaborating 
 |  | 
| Perfect |  | 
| collaborated 
 |  | 
| INFINITIVE |  | 
| Present |  | 
| to collaborate 
 |  | 
| Perfect |  | 
| have collaborated 
 |  | 
| GERUND |  | 
| Present |  | 
| collaborating 
 |  | 
| Perfect |  | 
| having collaborated 
 |  |