Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can contend contend you can contend contend she can contend contend we can contend contend you can contend contend they can contend contend
V-ing form
I can be contend contending you can be contend contending she can be contend contending we can be contend contending you can be contend contending they can be contend contending
Perfect
I can have contend contended you can have contend contended she can have contend contended we can have contend contended you can have contend contended they can have contend contended
V-ing perfect
I can have been contend contending you can have been contend contending she can have been contend contending we can have been contend contending you can have been contend contending they can have been contend contending
Negation
Simple form
I can't contend contend you can't contend contend she can't contend contend we can't contend contend you can't contend contend they can't contend contend
V-ing form
I can't be contend contending you can't be contend contending she can't be contend contending we can't be contend contending you can't be contend contending they can't be contend contending
Perfect
I can't have contend contended you can't have contend contended she can't have contend contended we can't have contend contended you can't have contend contended they can't have contend contended
V-ing perfect
I can't have been contend contending you can't have been contend contending she can't have been contend contending we can't have been contend contending you can't have been contend contending they can't have been contend contending
Interrogative form
Simple form
can I contend contend? can you contend contend? can she contend contend? can we contend contend? can you contend contend? can they contend contend?
V-ing form
can I be contend contending? can you be contend contending? can she be contend contending? can we be contend contending? can you be contend contending? can they be contend contending?
Perfect
can I have contend contended? can you have contend contended? can she have contend contended? can we have contend contended? can you have contend contended? can they have contend contended?
V-ing perfect
can I have been contend contending? can you have been contend contending? can she have been contend contending? can we have been contend contending? can you have been contend contending? can they have been contend contending?
Interro-negative form
Simple form
can't I contend contend? can't you contend contend? can't she contend contend? can't we contend contend? can't you contend contend? can't they contend contend?
V-ing form
can't I be contend contending? can't you be contend contending? can't she be contend contending? can't we be contend contending? can't you be contend contending? can't they be contend contending?
Perfect
can't I have contend contended? can't you have contend contended? can't she have contend contended? can't we have contend contended? can't you have contend contended? can't they have contend contended?
V-ing perfect
can't I have been contend contending? can't you have been contend contending? can't she have been contend contending? can't we have been contend contending? can't you have been contend contending? can't they have been contend contending?