English verb conjugation
COULD JUMP

Regular verb: jump - jumped - jumped

Affirmation

Simple form	V-ing form
I could jump you could jump she could jump we could jump you could jump they could jump	I could be jumping you could be jumping she could be jumping we could be jumping you could be jumping they could be jumping
Perfect	V-ing perfect
I could have jumped you could have jumped she could have jumped we could have jumped you could have jumped they could have jumped	I could have been jumping you could have been jumping she could have been jumping we could have been jumping you could have been jumping they could have been jumping

Negation

Simple form	V-ing form
I couldn't jump you couldn't jump she couldn't jump we couldn't jump you couldn't jump they couldn't jump	I couldn't be jumping you couldn't be jumping she couldn't be jumping we couldn't be jumping you couldn't be jumping they couldn't be jumping
Perfect	V-ing perfect
I couldn't have jumped you couldn't have jumped she couldn't have jumped we couldn't have jumped you couldn't have jumped they couldn't have jumped	I couldn't have been jumping you couldn't have been jumping she couldn't have been jumping we couldn't have been jumping you couldn't have been jumping they couldn't have been jumping

Interrogative form

Simple form	V-ing form
could I jump? could you jump? could she jump? could we jump? could you jump? could they jump?	could I be jumping? could you be jumping? could she be jumping? could we be jumping? could you be jumping? could they be jumping?
Perfect	V-ing perfect
could I have jumped? could you have jumped? could she have jumped? could we have jumped? could you have jumped? could they have jumped?	could I have been jumping? could you have been jumping? could she have been jumping? could we have been jumping? could you have been jumping? could they have been jumping?

Interro-negative form

Simple form	V-ing form
couldn't I jump? couldn't you jump? couldn't she jump? couldn't we jump? couldn't you jump? couldn't they jump?	couldn't I be jumping? couldn't you be jumping? couldn't she be jumping? couldn't we be jumping? couldn't you be jumping? couldn't they be jumping?
Perfect	V-ing perfect
couldn't I have jumped? couldn't you have jumped? couldn't she have jumped? couldn't we have jumped? couldn't you have jumped? couldn't they have jumped?	couldn't I have been jumping? couldn't you have been jumping? couldn't she have been jumping? couldn't we have been jumping? couldn't you have been jumping? couldn't they have been jumping?