English verb conjugation
SHOULD PRECERTIFY

Regular verb: precertify - precertified - precertified

Affirmation

Simple form	V-ing form
I'd precertify you'd precertify she'd precertify we'd precertify you'd precertify they'd precertify	I'd be precertifying you'd be precertifying she'd be precertifying we'd be precertifying you'd be precertifying they'd be precertifying
Perfect	V-ing perfect
I should've precertified you should've precertified she should've precertified we should've precertified you should've precertified they should've precertified	I should've been precertifying you should've been precertifying she should've been precertifying we should've been precertifying you should've been precertifying they should've been precertifying

Negation

Simple form	V-ing form
I shouldn't precertify you shouldn't precertify she shouldn't precertify we shouldn't precertify you shouldn't precertify they shouldn't precertify	I shouldn't be precertifying you shouldn't be precertifying she shouldn't be precertifying we shouldn't be precertifying you shouldn't be precertifying they shouldn't be precertifying
Perfect	V-ing perfect
I shouldn't have precertified you shouldn't have precertified she shouldn't have precertified we shouldn't have precertified you shouldn't have precertified they shouldn't have precertified	I shouldn't have been precertifying you shouldn't have been precertifying she shouldn't have been precertifying we shouldn't have been precertifying you shouldn't have been precertifying they shouldn't have been precertifying

Interrogative form

Simple form	V-ing form
should I precertify? should you precertify? should she precertify? should we precertify? should you precertify? should they precertify?	should I be precertifying? should you be precertifying? should she be precertifying? should we be precertifying? should you be precertifying? should they be precertifying?
Perfect	V-ing perfect
should I have precertified? should you have precertified? should she have precertified? should we have precertified? should you have precertified? should they have precertified?	should I have been precertifying? should you have been precertifying? should she have been precertifying? should we have been precertifying? should you have been precertifying? should they have been precertifying?

Interro-negative form

Simple form	V-ing form
shouldn't I precertify? shouldn't you precertify? shouldn't she precertify? shouldn't we precertify? shouldn't you precertify? shouldn't they precertify?	shouldn't I be precertifying? shouldn't you be precertifying? shouldn't she be precertifying? shouldn't we be precertifying? shouldn't you be precertifying? shouldn't they be precertifying?
Perfect	V-ing perfect
shouldn't I have precertified? shouldn't you have precertified? shouldn't she have precertified? shouldn't we have precertified? shouldn't you have precertified? shouldn't they have precertified?	shouldn't I have been precertifying? shouldn't you have been precertifying? shouldn't she have been precertifying? shouldn't we have been precertifying? shouldn't you have been precertifying? shouldn't they have been precertifying?