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