I can extrude you can extrude he can extrude we can extrude you can extrude they can extrude
V-ing form
I can be extruding you can be extruding he can be extruding we can be extruding you can be extruding they can be extruding
Perfect
I can have extruded you can have extruded he can have extruded we can have extruded you can have extruded they can have extruded
V-ing perfect
I can have been extruding you can have been extruding he can have been extruding we can have been extruding you can have been extruding they can have been extruding
Negation
Simple form
I cannot extrude you cannot extrude he cannot extrude we cannot extrude you cannot extrude they cannot extrude
V-ing form
I cannot be extruding you cannot be extruding he cannot be extruding we cannot be extruding you cannot be extruding they cannot be extruding
Perfect
I cannot have extruded you cannot have extruded he cannot have extruded we cannot have extruded you cannot have extruded they cannot have extruded
V-ing perfect
I cannot have been extruding you cannot have been extruding he cannot have been extruding we cannot have been extruding you cannot have been extruding they cannot have been extruding
Interrogative form
Simple form
can I extrude? can you extrude? can he extrude? can we extrude? can you extrude? can they extrude?
V-ing form
can I be extruding? can you be extruding? can he be extruding? can we be extruding? can you be extruding? can they be extruding?
Perfect
can I have extruded? can you have extruded? can he have extruded? can we have extruded? can you have extruded? can they have extruded?
V-ing perfect
can I have been extruding? can you have been extruding? can he have been extruding? can we have been extruding? can you have been extruding? can they have been extruding?
Interro-negative form
Simple form
can I not extrude? can you not extrude? can he not extrude? can we not extrude? can you not extrude? can they not extrude?
V-ing form
can I not be extruding? can you not be extruding? can he not be extruding? can we not be extruding? can you not be extruding? can they not be extruding?
Perfect
can I not have extruded? can you not have extruded? can he not have extruded? can we not have extruded? can you not have extruded? can they not have extruded?
V-ing perfect
can I not have been extruding? can you not have been extruding? can he not have been extruding? can we not have been extruding? can you not have been extruding? can they not have been extruding?