English verb conjugation
COULD AHEAD

Regular verb: ahead - aheaded - aheaded

Affirmation

Simple form	V-ing form
I could ahead you could ahead he could ahead we could ahead you could ahead they could ahead	I could be aheading you could be aheading he could be aheading we could be aheading you could be aheading they could be aheading
Perfect	V-ing perfect
I could have aheaded you could have aheaded he could have aheaded we could have aheaded you could have aheaded they could have aheaded	I could have been aheading you could have been aheading he could have been aheading we could have been aheading you could have been aheading they could have been aheading

Negation

Simple form	V-ing form
I couldn't ahead you couldn't ahead he couldn't ahead we couldn't ahead you couldn't ahead they couldn't ahead	I couldn't be aheading you couldn't be aheading he couldn't be aheading we couldn't be aheading you couldn't be aheading they couldn't be aheading
Perfect	V-ing perfect
I couldn't have aheaded you couldn't have aheaded he couldn't have aheaded we couldn't have aheaded you couldn't have aheaded they couldn't have aheaded	I couldn't have been aheading you couldn't have been aheading he couldn't have been aheading we couldn't have been aheading you couldn't have been aheading they couldn't have been aheading

Interrogative form

Simple form	V-ing form
could I ahead? could you ahead? could he ahead? could we ahead? could you ahead? could they ahead?	could I be aheading? could you be aheading? could he be aheading? could we be aheading? could you be aheading? could they be aheading?
Perfect	V-ing perfect
could I have aheaded? could you have aheaded? could he have aheaded? could we have aheaded? could you have aheaded? could they have aheaded?	could I have been aheading? could you have been aheading? could he have been aheading? could we have been aheading? could you have been aheading? could they have been aheading?

Interro-negative form

Simple form	V-ing form
couldn't I ahead? couldn't you ahead? couldn't he ahead? couldn't we ahead? couldn't you ahead? couldn't they ahead?	couldn't I be aheading? couldn't you be aheading? couldn't he be aheading? couldn't we be aheading? couldn't you be aheading? couldn't they be aheading?
Perfect	V-ing perfect
couldn't I have aheaded? couldn't you have aheaded? couldn't he have aheaded? couldn't we have aheaded? couldn't you have aheaded? couldn't they have aheaded?	couldn't I have been aheading? couldn't you have been aheading? couldn't he have been aheading? couldn't we have been aheading? couldn't you have been aheading? couldn't they have been aheading?