Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could assign charge you could assign charge he could assign charge we could assign charge you could assign charge they could assign charge
V-ing form
I could be assign charging you could be assign charging he could be assign charging we could be assign charging you could be assign charging they could be assign charging
Perfect
I could have assign charged you could have assign charged he could have assign charged we could have assign charged you could have assign charged they could have assign charged
V-ing perfect
I could have been assign charging you could have been assign charging he could have been assign charging we could have been assign charging you could have been assign charging they could have been assign charging
Negation
Simple form
I couldn't assign charge you couldn't assign charge he couldn't assign charge we couldn't assign charge you couldn't assign charge they couldn't assign charge
V-ing form
I couldn't be assign charging you couldn't be assign charging he couldn't be assign charging we couldn't be assign charging you couldn't be assign charging they couldn't be assign charging
Perfect
I couldn't have assign charged you couldn't have assign charged he couldn't have assign charged we couldn't have assign charged you couldn't have assign charged they couldn't have assign charged
V-ing perfect
I couldn't have been assign charging you couldn't have been assign charging he couldn't have been assign charging we couldn't have been assign charging you couldn't have been assign charging they couldn't have been assign charging
Interrogative form
Simple form
could I assign charge? could you assign charge? could he assign charge? could we assign charge? could you assign charge? could they assign charge?
V-ing form
could I be assign charging? could you be assign charging? could he be assign charging? could we be assign charging? could you be assign charging? could they be assign charging?
Perfect
could I have assign charged? could you have assign charged? could he have assign charged? could we have assign charged? could you have assign charged? could they have assign charged?
V-ing perfect
could I have been assign charging? could you have been assign charging? could he have been assign charging? could we have been assign charging? could you have been assign charging? could they have been assign charging?
Interro-negative form
Simple form
couldn't I assign charge? couldn't you assign charge? couldn't he assign charge? couldn't we assign charge? couldn't you assign charge? couldn't they assign charge?
V-ing form
couldn't I be assign charging? couldn't you be assign charging? couldn't he be assign charging? couldn't we be assign charging? couldn't you be assign charging? couldn't they be assign charging?
Perfect
couldn't I have assign charged? couldn't you have assign charged? couldn't he have assign charged? couldn't we have assign charged? couldn't you have assign charged? couldn't they have assign charged?
V-ing perfect
couldn't I have been assign charging? couldn't you have been assign charging? couldn't he have been assign charging? couldn't we have been assign charging? couldn't you have been assign charging? couldn't they have been assign charging?