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