can waddle
Regular verb: waddle - waddled- waddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can waddle
you can waddle
he can waddle
we can waddle
you can waddle
they can waddle 	I can be waddling
you can be waddling
he can be waddling
we can be waddling
you can be waddling
they can be waddling	I can have waddled
you can have waddled
he can have waddled
we can have waddled
you can have waddled
they can have waddled	I can have been waddling
you can have been waddling
he can have been waddling
we can have been waddling
you can have been waddling
they can have been waddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot waddle
you cannot waddle
he cannot waddle
we cannot waddle
you cannot waddle
they cannot waddle 	I cannot be waddling
you cannot be waddling
he cannot be waddling
we cannot be waddling
you cannot be waddling
they cannot be waddling	I cannot have waddled
you cannot have waddled
he cannot have waddled
we cannot have waddled
you cannot have waddled
they cannot have waddled	I cannot have been waddling
you cannot have been waddling
he cannot have been waddling
we cannot have been waddling
you cannot have been waddling
they cannot have been waddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I waddle?
can you waddle?
can he waddle?
can we waddle?
can you waddle?
can they waddle? 	can I be waddling?
can you be waddling?
can he be waddling?
can we be waddling?
can you be waddling?
can they be waddling? 	can I have waddled?
can you have waddled?
can he have waddled?
can we have waddled?
can you have waddled?
can they have waddled? 	can I have been waddling?
can you have been waddling?
can he have been waddling?
can we have been waddling?
can you have been waddling?
can they have been waddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not waddle?
can you not waddle?
can he not waddle?
can we not waddle?
can you not waddle?
can they not waddle? 	can I not be waddling?
can you not be waddling?
can he not be waddling?
can we not be waddling?
can you not be waddling?
can they not be waddling? 	can I not have waddled?
can you not have waddled?
can he not have waddled?
can we not have waddled?
can you not have waddled?
can they not have waddled? 	can I not have been waddling?
can you not have been waddling?
can he not have been waddling?
can we not have been waddling?
can you not have been waddling?
can they not have been waddling?