I could verbalize you could verbalize he could verbalize we could verbalize you could verbalize they could verbalize
V-ing form
I could be verbalizing you could be verbalizing he could be verbalizing we could be verbalizing you could be verbalizing they could be verbalizing
Perfect
I could have verbalized you could have verbalized he could have verbalized we could have verbalized you could have verbalized they could have verbalized
V-ing perfect
I could have been verbalizing you could have been verbalizing he could have been verbalizing we could have been verbalizing you could have been verbalizing they could have been verbalizing
Negation
Simple form
I couldn't verbalize you couldn't verbalize he couldn't verbalize we couldn't verbalize you couldn't verbalize they couldn't verbalize
V-ing form
I couldn't be verbalizing you couldn't be verbalizing he couldn't be verbalizing we couldn't be verbalizing you couldn't be verbalizing they couldn't be verbalizing
Perfect
I couldn't have verbalized you couldn't have verbalized he couldn't have verbalized we couldn't have verbalized you couldn't have verbalized they couldn't have verbalized
V-ing perfect
I couldn't have been verbalizing you couldn't have been verbalizing he couldn't have been verbalizing we couldn't have been verbalizing you couldn't have been verbalizing they couldn't have been verbalizing
Interrogative form
Simple form
could I verbalize? could you verbalize? could he verbalize? could we verbalize? could you verbalize? could they verbalize?
V-ing form
could I be verbalizing? could you be verbalizing? could he be verbalizing? could we be verbalizing? could you be verbalizing? could they be verbalizing?
Perfect
could I have verbalized? could you have verbalized? could he have verbalized? could we have verbalized? could you have verbalized? could they have verbalized?
V-ing perfect
could I have been verbalizing? could you have been verbalizing? could he have been verbalizing? could we have been verbalizing? could you have been verbalizing? could they have been verbalizing?
Interro-negative form
Simple form
couldn't I verbalize? couldn't you verbalize? couldn't he verbalize? couldn't we verbalize? couldn't you verbalize? couldn't they verbalize?
V-ing form
couldn't I be verbalizing? couldn't you be verbalizing? couldn't he be verbalizing? couldn't we be verbalizing? couldn't you be verbalizing? couldn't they be verbalizing?
Perfect
couldn't I have verbalized? couldn't you have verbalized? couldn't he have verbalized? couldn't we have verbalized? couldn't you have verbalized? couldn't they have verbalized?
V-ing perfect
couldn't I have been verbalizing? couldn't you have been verbalizing? couldn't he have been verbalizing? couldn't we have been verbalizing? couldn't you have been verbalizing? couldn't they have been verbalizing?