English verb conjugation
COULD OFFEND

Regular verb: offend - offended - offended

Affirmation

Simple form	V-ing form
I could offend you could offend he could offend we could offend you could offend they could offend	I could be offending you could be offending he could be offending we could be offending you could be offending they could be offending
Perfect	V-ing perfect
I could have offended you could have offended he could have offended we could have offended you could have offended they could have offended	I could have been offending you could have been offending he could have been offending we could have been offending you could have been offending they could have been offending

Negation

Simple form	V-ing form
I couldn't offend you couldn't offend he couldn't offend we couldn't offend you couldn't offend they couldn't offend	I couldn't be offending you couldn't be offending he couldn't be offending we couldn't be offending you couldn't be offending they couldn't be offending
Perfect	V-ing perfect
I couldn't have offended you couldn't have offended he couldn't have offended we couldn't have offended you couldn't have offended they couldn't have offended	I couldn't have been offending you couldn't have been offending he couldn't have been offending we couldn't have been offending you couldn't have been offending they couldn't have been offending

Interrogative form

Simple form	V-ing form
could I offend? could you offend? could he offend? could we offend? could you offend? could they offend?	could I be offending? could you be offending? could he be offending? could we be offending? could you be offending? could they be offending?
Perfect	V-ing perfect
could I have offended? could you have offended? could he have offended? could we have offended? could you have offended? could they have offended?	could I have been offending? could you have been offending? could he have been offending? could we have been offending? could you have been offending? could they have been offending?

Interro-negative form

Simple form	V-ing form
couldn't I offend? couldn't you offend? couldn't he offend? couldn't we offend? couldn't you offend? couldn't they offend?	couldn't I be offending? couldn't you be offending? couldn't he be offending? couldn't we be offending? couldn't you be offending? couldn't they be offending?
Perfect	V-ing perfect
couldn't I have offended? couldn't you have offended? couldn't he have offended? couldn't we have offended? couldn't you have offended? couldn't they have offended?	couldn't I have been offending? couldn't you have been offending? couldn't he have been offending? couldn't we have been offending? couldn't you have been offending? couldn't they have been offending?