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