I could accredit you could accredit she could accredit we could accredit you could accredit they could accredit
V-ing form
I could be accrediting you could be accrediting she could be accrediting we could be accrediting you could be accrediting they could be accrediting
Perfect
I could have accredited you could have accredited she could have accredited we could have accredited you could have accredited they could have accredited
V-ing perfect
I could have been accrediting you could have been accrediting she could have been accrediting we could have been accrediting you could have been accrediting they could have been accrediting
Negation
Simple form
I couldn't accredit you couldn't accredit she couldn't accredit we couldn't accredit you couldn't accredit they couldn't accredit
V-ing form
I couldn't be accrediting you couldn't be accrediting she couldn't be accrediting we couldn't be accrediting you couldn't be accrediting they couldn't be accrediting
Perfect
I couldn't have accredited you couldn't have accredited she couldn't have accredited we couldn't have accredited you couldn't have accredited they couldn't have accredited
V-ing perfect
I couldn't have been accrediting you couldn't have been accrediting she couldn't have been accrediting we couldn't have been accrediting you couldn't have been accrediting they couldn't have been accrediting
Interrogative form
Simple form
could I accredit? could you accredit? could she accredit? could we accredit? could you accredit? could they accredit?
V-ing form
could I be accrediting? could you be accrediting? could she be accrediting? could we be accrediting? could you be accrediting? could they be accrediting?
Perfect
could I have accredited? could you have accredited? could she have accredited? could we have accredited? could you have accredited? could they have accredited?
V-ing perfect
could I have been accrediting? could you have been accrediting? could she have been accrediting? could we have been accrediting? could you have been accrediting? could they have been accrediting?
Interro-negative form
Simple form
couldn't I accredit? couldn't you accredit? couldn't she accredit? couldn't we accredit? couldn't you accredit? couldn't they accredit?
V-ing form
couldn't I be accrediting? couldn't you be accrediting? couldn't she be accrediting? couldn't we be accrediting? couldn't you be accrediting? couldn't they be accrediting?
Perfect
couldn't I have accredited? couldn't you have accredited? couldn't she have accredited? couldn't we have accredited? couldn't you have accredited? couldn't they have accredited?
V-ing perfect
couldn't I have been accrediting? couldn't you have been accrediting? couldn't she have been accrediting? couldn't we have been accrediting? couldn't you have been accrediting? couldn't they have been accrediting?