English verb conjugation
COULD CODE

Regular verb: code - coded - coded

Affirmation

Simple form	V-ing form
I could code you could code she could code we could code you could code they could code	I could be coding you could be coding she could be coding we could be coding you could be coding they could be coding
Perfect	V-ing perfect
I could have coded you could have coded she could have coded we could have coded you could have coded they could have coded	I could have been coding you could have been coding she could have been coding we could have been coding you could have been coding they could have been coding

Negation

Simple form	V-ing form
I couldn't code you couldn't code she couldn't code we couldn't code you couldn't code they couldn't code	I couldn't be coding you couldn't be coding she couldn't be coding we couldn't be coding you couldn't be coding they couldn't be coding
Perfect	V-ing perfect
I couldn't have coded you couldn't have coded she couldn't have coded we couldn't have coded you couldn't have coded they couldn't have coded	I couldn't have been coding you couldn't have been coding she couldn't have been coding we couldn't have been coding you couldn't have been coding they couldn't have been coding

Interrogative form

Simple form	V-ing form
could I code? could you code? could she code? could we code? could you code? could they code?	could I be coding? could you be coding? could she be coding? could we be coding? could you be coding? could they be coding?
Perfect	V-ing perfect
could I have coded? could you have coded? could she have coded? could we have coded? could you have coded? could they have coded?	could I have been coding? could you have been coding? could she have been coding? could we have been coding? could you have been coding? could they have been coding?

Interro-negative form

Simple form	V-ing form
couldn't I code? couldn't you code? couldn't she code? couldn't we code? couldn't you code? couldn't they code?	couldn't I be coding? couldn't you be coding? couldn't she be coding? couldn't we be coding? couldn't you be coding? couldn't they be coding?
Perfect	V-ing perfect
couldn't I have coded? couldn't you have coded? couldn't she have coded? couldn't we have coded? couldn't you have coded? couldn't they have coded?	couldn't I have been coding? couldn't you have been coding? couldn't she have been coding? couldn't we have been coding? couldn't you have been coding? couldn't they have been coding?