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