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