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