English verb conjugation
COULD PRECERTIFY

Regular verb: precertify - precertified - precertified

Affirmation

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

Negation

Simple form	V-ing form
I could not precertify you could not precertify she could not precertify we could not precertify you could not precertify they could not precertify	I could not be precertifying you could not be precertifying she could not be precertifying we could not be precertifying you could not be precertifying they could not be precertifying
Perfect	V-ing perfect
I could not have precertified you could not have precertified she could not have precertified we could not have precertified you could not have precertified they could not have precertified	I could not have been precertifying you could not have been precertifying she could not have been precertifying we could not have been precertifying you could not have been precertifying they could not have been precertifying

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not precertify? could you not precertify? could she not precertify? could we not precertify? could you not precertify? could they not precertify?	could I not be precertifying? could you not be precertifying? could she not be precertifying? could we not be precertifying? could you not be precertifying? could they not be precertifying?
Perfect	V-ing perfect
could I not have precertified? could you not have precertified? could she not have precertified? could we not have precertified? could you not have precertified? could they not have precertified?	could I not have been precertifying? could you not have been precertifying? could she not have been precertifying? could we not have been precertifying? could you not have been precertifying? could they not have been precertifying?