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