I can cloud you can cloud he can cloud we can cloud you can cloud they can cloud
V-ing form
I can be clouding you can be clouding he can be clouding we can be clouding you can be clouding they can be clouding
Perfect
I can have clouded you can have clouded he 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 he 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 he cannot cloud we cannot cloud you cannot cloud they cannot cloud
V-ing form
I cannot be clouding you cannot be clouding he cannot be clouding we cannot be clouding you cannot be clouding they cannot be clouding
Perfect
I cannot have clouded you cannot have clouded he 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 he 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 he cloud? can we cloud? can you cloud? can they cloud?
V-ing form
can I be clouding? can you be clouding? can he be clouding? can we be clouding? can you be clouding? can they be clouding?
Perfect
can I have clouded? can you have clouded? can he 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 he 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 he 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 he 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 he 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 he not have been clouding? can we not have been clouding? can you not have been clouding? can they not have been clouding?