I could glisten you could glisten she could glisten we could glisten you could glisten they could glisten
V-ing form
I could be glistening you could be glistening she could be glistening we could be glistening you could be glistening they could be glistening
Perfect
I could have glistened you could have glistened she could have glistened we could have glistened you could have glistened they could have glistened
V-ing perfect
I could have been glistening you could have been glistening she could have been glistening we could have been glistening you could have been glistening they could have been glistening
Negation
Simple form
I couldn't glisten you couldn't glisten she couldn't glisten we couldn't glisten you couldn't glisten they couldn't glisten
V-ing form
I couldn't be glistening you couldn't be glistening she couldn't be glistening we couldn't be glistening you couldn't be glistening they couldn't be glistening
Perfect
I couldn't have glistened you couldn't have glistened she couldn't have glistened we couldn't have glistened you couldn't have glistened they couldn't have glistened
V-ing perfect
I couldn't have been glistening you couldn't have been glistening she couldn't have been glistening we couldn't have been glistening you couldn't have been glistening they couldn't have been glistening
Interrogative form
Simple form
could I glisten? could you glisten? could she glisten? could we glisten? could you glisten? could they glisten?
V-ing form
could I be glistening? could you be glistening? could she be glistening? could we be glistening? could you be glistening? could they be glistening?
Perfect
could I have glistened? could you have glistened? could she have glistened? could we have glistened? could you have glistened? could they have glistened?
V-ing perfect
could I have been glistening? could you have been glistening? could she have been glistening? could we have been glistening? could you have been glistening? could they have been glistening?
Interro-negative form
Simple form
couldn't I glisten? couldn't you glisten? couldn't she glisten? couldn't we glisten? couldn't you glisten? couldn't they glisten?
V-ing form
couldn't I be glistening? couldn't you be glistening? couldn't she be glistening? couldn't we be glistening? couldn't you be glistening? couldn't they be glistening?
Perfect
couldn't I have glistened? couldn't you have glistened? couldn't she have glistened? couldn't we have glistened? couldn't you have glistened? couldn't they have glistened?
V-ing perfect
couldn't I have been glistening? couldn't you have been glistening? couldn't she have been glistening? couldn't we have been glistening? couldn't you have been glistening? couldn't they have been glistening?