English verb conjugation
COULD MANGLE

Regular verb: mangle - mangled - mangled

Affirmation

Simple form	V-ing form
I could mangle you could mangle she could mangle we could mangle you could mangle they could mangle	I could be mangling you could be mangling she could be mangling we could be mangling you could be mangling they could be mangling
Perfect	V-ing perfect
I could have mangled you could have mangled she could have mangled we could have mangled you could have mangled they could have mangled	I could have been mangling you could have been mangling she could have been mangling we could have been mangling you could have been mangling they could have been mangling

Negation

Simple form	V-ing form
I couldn't mangle you couldn't mangle she couldn't mangle we couldn't mangle you couldn't mangle they couldn't mangle	I couldn't be mangling you couldn't be mangling she couldn't be mangling we couldn't be mangling you couldn't be mangling they couldn't be mangling
Perfect	V-ing perfect
I couldn't have mangled you couldn't have mangled she couldn't have mangled we couldn't have mangled you couldn't have mangled they couldn't have mangled	I couldn't have been mangling you couldn't have been mangling she couldn't have been mangling we couldn't have been mangling you couldn't have been mangling they couldn't have been mangling

Interrogative form

Simple form	V-ing form
could I mangle? could you mangle? could she mangle? could we mangle? could you mangle? could they mangle?	could I be mangling? could you be mangling? could she be mangling? could we be mangling? could you be mangling? could they be mangling?
Perfect	V-ing perfect
could I have mangled? could you have mangled? could she have mangled? could we have mangled? could you have mangled? could they have mangled?	could I have been mangling? could you have been mangling? could she have been mangling? could we have been mangling? could you have been mangling? could they have been mangling?

Interro-negative form

Simple form	V-ing form
couldn't I mangle? couldn't you mangle? couldn't she mangle? couldn't we mangle? couldn't you mangle? couldn't they mangle?	couldn't I be mangling? couldn't you be mangling? couldn't she be mangling? couldn't we be mangling? couldn't you be mangling? couldn't they be mangling?
Perfect	V-ing perfect
couldn't I have mangled? couldn't you have mangled? couldn't she have mangled? couldn't we have mangled? couldn't you have mangled? couldn't they have mangled?	couldn't I have been mangling? couldn't you have been mangling? couldn't she have been mangling? couldn't we have been mangling? couldn't you have been mangling? couldn't they have been mangling?