I could air-drop you could air-drop she could air-drop we could air-drop you could air-drop they could air-drop
V-ing form
I could be air-droping you could be air-droping she could be air-droping we could be air-droping you could be air-droping they could be air-droping
Perfect
I could have air-droped you could have air-droped she could have air-droped we could have air-droped you could have air-droped they could have air-droped
V-ing perfect
I could have been air-droping you could have been air-droping she could have been air-droping we could have been air-droping you could have been air-droping they could have been air-droping
Negation
Simple form
I couldn't air-drop you couldn't air-drop she couldn't air-drop we couldn't air-drop you couldn't air-drop they couldn't air-drop
V-ing form
I couldn't be air-droping you couldn't be air-droping she couldn't be air-droping we couldn't be air-droping you couldn't be air-droping they couldn't be air-droping
Perfect
I couldn't have air-droped you couldn't have air-droped she couldn't have air-droped we couldn't have air-droped you couldn't have air-droped they couldn't have air-droped
V-ing perfect
I couldn't have been air-droping you couldn't have been air-droping she couldn't have been air-droping we couldn't have been air-droping you couldn't have been air-droping they couldn't have been air-droping
Interrogative form
Simple form
could I air-drop? could you air-drop? could she air-drop? could we air-drop? could you air-drop? could they air-drop?
V-ing form
could I be air-droping? could you be air-droping? could she be air-droping? could we be air-droping? could you be air-droping? could they be air-droping?
Perfect
could I have air-droped? could you have air-droped? could she have air-droped? could we have air-droped? could you have air-droped? could they have air-droped?
V-ing perfect
could I have been air-droping? could you have been air-droping? could she have been air-droping? could we have been air-droping? could you have been air-droping? could they have been air-droping?
Interro-negative form
Simple form
couldn't I air-drop? couldn't you air-drop? couldn't she air-drop? couldn't we air-drop? couldn't you air-drop? couldn't they air-drop?
V-ing form
couldn't I be air-droping? couldn't you be air-droping? couldn't she be air-droping? couldn't we be air-droping? couldn't you be air-droping? couldn't they be air-droping?
Perfect
couldn't I have air-droped? couldn't you have air-droped? couldn't she have air-droped? couldn't we have air-droped? couldn't you have air-droped? couldn't they have air-droped?
V-ing perfect
couldn't I have been air-droping? couldn't you have been air-droping? couldn't she have been air-droping? couldn't we have been air-droping? couldn't you have been air-droping? couldn't they have been air-droping?