
Regular verb: flock - flocked - flocked
Simple form | V-ing form | 
| I'd flock you'd flock she'd flock we'd flock you'd flock they'd flock  | I'd be flocking you'd be flocking she'd be flocking we'd be flocking you'd be flocking they'd be flocking  | 
Perfect | V-ing perfect | 
| I should've flocked you should've flocked she should've flocked we should've flocked you should've flocked they should've flocked  | I should've been flocking you should've been flocking she should've been flocking we should've been flocking you should've been flocking they should've been flocking  | 
Simple form | V-ing form | 
| I shouldn't flock you shouldn't flock she shouldn't flock we shouldn't flock you shouldn't flock they shouldn't flock  | I shouldn't be flocking you shouldn't be flocking she shouldn't be flocking we shouldn't be flocking you shouldn't be flocking they shouldn't be flocking  | 
Perfect | V-ing perfect | 
| I shouldn't have flocked you shouldn't have flocked she shouldn't have flocked we shouldn't have flocked you shouldn't have flocked they shouldn't have flocked  | I shouldn't have been flocking you shouldn't have been flocking she shouldn't have been flocking we shouldn't have been flocking you shouldn't have been flocking they shouldn't have been flocking  | 
Simple form | V-ing form | 
| should I flock? should you flock? should she flock? should we flock? should you flock? should they flock?  | should I be flocking? should you be flocking? should she be flocking? should we be flocking? should you be flocking? should they be flocking?  | 
Perfect | V-ing perfect | 
| should I have flocked? should you have flocked? should she have flocked? should we have flocked? should you have flocked? should they have flocked?  | should I have been flocking? should you have been flocking? should she have been flocking? should we have been flocking? should you have been flocking? should they have been flocking?  | 
Simple form | V-ing form | 
| shouldn't I flock? shouldn't you flock? shouldn't she flock? shouldn't we flock? shouldn't you flock? shouldn't they flock?  | shouldn't I be flocking? shouldn't you be flocking? shouldn't she be flocking? shouldn't we be flocking? shouldn't you be flocking? shouldn't they be flocking?  | 
Perfect | V-ing perfect | 
| shouldn't I have flocked? shouldn't you have flocked? shouldn't she have flocked? shouldn't we have flocked? shouldn't you have flocked? shouldn't they have flocked?  | shouldn't I have been flocking? shouldn't you have been flocking? shouldn't she have been flocking? shouldn't we have been flocking? shouldn't you have been flocking? shouldn't they have been flocking?  |