Conjugaison du verbe anglais COULD MASTER

I could master
you could master
she could master
we could master
you could master
they could master

I could be mastering
you could be mastering
she could be mastering
we could be mastering
you could be mastering
they could be mastering

I could have mastered
you could have mastered
she could have mastered
we could have mastered
you could have mastered
they could have mastered

I could have been mastering
you could have been mastering
she could have been mastering
we could have been mastering
you could have been mastering
they could have been mastering

I could not master
you could not master
she could not master
we could not master
you could not master
they could not master

I could not be mastering
you could not be mastering
she could not be mastering
we could not be mastering
you could not be mastering
they could not be mastering

I could not have mastered
you could not have mastered
she could not have mastered
we could not have mastered
you could not have mastered
they could not have mastered

I could not have been mastering
you could not have been mastering
she could not have been mastering
we could not have been mastering
you could not have been mastering
they could not have been mastering

could I master?
could you master?
could she master?
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could you master?
could they master?

could I be mastering?
could you be mastering?
could she be mastering?
could we be mastering?
could you be mastering?
could they be mastering?

could I have mastered?
could you have mastered?
could she have mastered?
could we have mastered?
could you have mastered?
could they have mastered?

could I have been mastering?
could you have been mastering?
could she have been mastering?
could we have been mastering?
could you have been mastering?
could they have been mastering?

could I not master?
could you not master?
could she not master?
could we not master?
could you not master?
could they not master?

could I not be mastering?
could you not be mastering?
could she not be mastering?
could we not be mastering?
could you not be mastering?
could they not be mastering?

could I not have mastered?
could you not have mastered?
could she not have mastered?
could we not have mastered?
could you not have mastered?
could they not have mastered?

could I not have been mastering?
could you not have been mastering?
could she not have been mastering?
could we not have been mastering?
could you not have been mastering?
could they not have been mastering?