
Regular verb: celebrate - celebrated - celebrated
Simple form | V-ing form | 
| I'd celebrate you'd celebrate he'd celebrate we'd celebrate you'd celebrate they'd celebrate  | I'd be celebrating you'd be celebrating he'd be celebrating we'd be celebrating you'd be celebrating they'd be celebrating  | 
Perfect | V-ing perfect | 
| I should've celebrated you should've celebrated he should've celebrated we should've celebrated you should've celebrated they should've celebrated  | I should've been celebrating you should've been celebrating he should've been celebrating we should've been celebrating you should've been celebrating they should've been celebrating  | 
Simple form | V-ing form | 
| I shouldn't celebrate you shouldn't celebrate he shouldn't celebrate we shouldn't celebrate you shouldn't celebrate they shouldn't celebrate  | I shouldn't be celebrating you shouldn't be celebrating he shouldn't be celebrating we shouldn't be celebrating you shouldn't be celebrating they shouldn't be celebrating  | 
Perfect | V-ing perfect | 
| I shouldn't have celebrated you shouldn't have celebrated he shouldn't have celebrated we shouldn't have celebrated you shouldn't have celebrated they shouldn't have celebrated  | I shouldn't have been celebrating you shouldn't have been celebrating he shouldn't have been celebrating we shouldn't have been celebrating you shouldn't have been celebrating they shouldn't have been celebrating  | 
Simple form | V-ing form | 
| should I celebrate? should you celebrate? should he celebrate? should we celebrate? should you celebrate? should they celebrate?  | should I be celebrating? should you be celebrating? should he be celebrating? should we be celebrating? should you be celebrating? should they be celebrating?  | 
Perfect | V-ing perfect | 
| should I have celebrated? should you have celebrated? should he have celebrated? should we have celebrated? should you have celebrated? should they have celebrated?  | should I have been celebrating? should you have been celebrating? should he have been celebrating? should we have been celebrating? should you have been celebrating? should they have been celebrating?  | 
Simple form | V-ing form | 
| shouldn't I celebrate? shouldn't you celebrate? shouldn't he celebrate? shouldn't we celebrate? shouldn't you celebrate? shouldn't they celebrate?  | shouldn't I be celebrating? shouldn't you be celebrating? shouldn't he be celebrating? shouldn't we be celebrating? shouldn't you be celebrating? shouldn't they be celebrating?  | 
Perfect | V-ing perfect | 
| shouldn't I have celebrated? shouldn't you have celebrated? shouldn't he have celebrated? shouldn't we have celebrated? shouldn't you have celebrated? shouldn't they have celebrated?  | shouldn't I have been celebrating? shouldn't you have been celebrating? shouldn't he have been celebrating? shouldn't we have been celebrating? shouldn't you have been celebrating? shouldn't they have been celebrating?  |