I can cloud you can cloud she can cloud we can cloud you can cloud they can cloud
V-ing form
I can be clouding you can be clouding she can be clouding we can be clouding you can be clouding they can be clouding
Perfect
I can have clouded you can have clouded she can have clouded we can have clouded you can have clouded they can have clouded
V-ing perfect
I can have been clouding you can have been clouding she can have been clouding we can have been clouding you can have been clouding they can have been clouding
Negation
Simple form
I cannot cloud you cannot cloud she cannot cloud we cannot cloud you cannot cloud they cannot cloud
V-ing form
I cannot be clouding you cannot be clouding she cannot be clouding we cannot be clouding you cannot be clouding they cannot be clouding
Perfect
I cannot have clouded you cannot have clouded she cannot have clouded we cannot have clouded you cannot have clouded they cannot have clouded
V-ing perfect
I cannot have been clouding you cannot have been clouding she cannot have been clouding we cannot have been clouding you cannot have been clouding they cannot have been clouding
Interrogative form
Simple form
can I cloud? can you cloud? can she cloud? can we cloud? can you cloud? can they cloud?
V-ing form
can I be clouding? can you be clouding? can she be clouding? can we be clouding? can you be clouding? can they be clouding?
Perfect
can I have clouded? can you have clouded? can she have clouded? can we have clouded? can you have clouded? can they have clouded?
V-ing perfect
can I have been clouding? can you have been clouding? can she have been clouding? can we have been clouding? can you have been clouding? can they have been clouding?
Interro-negative form
Simple form
can I not cloud? can you not cloud? can she not cloud? can we not cloud? can you not cloud? can they not cloud?
V-ing form
can I not be clouding? can you not be clouding? can she not be clouding? can we not be clouding? can you not be clouding? can they not be clouding?
Perfect
can I not have clouded? can you not have clouded? can she not have clouded? can we not have clouded? can you not have clouded? can they not have clouded?
V-ing perfect
can I not have been clouding? can you not have been clouding? can she not have been clouding? can we not have been clouding? can you not have been clouding? can they not have been clouding?