can swallow
Regular verb: swallow - swallowed- swallowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can swallow
you can swallow
he can swallow
we can swallow
you can swallow
they can swallow 	I can be swallowing
you can be swallowing
he can be swallowing
we can be swallowing
you can be swallowing
they can be swallowing	I can have swallowed
you can have swallowed
he can have swallowed
we can have swallowed
you can have swallowed
they can have swallowed	I can have been swallowing
you can have been swallowing
he can have been swallowing
we can have been swallowing
you can have been swallowing
they can have been swallowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't swallow
you can't swallow
he can't swallow
we can't swallow
you can't swallow
they can't swallow 	I can't be swallowing
you can't be swallowing
he can't be swallowing
we can't be swallowing
you can't be swallowing
they can't be swallowing	I can't have swallowed
you can't have swallowed
he can't have swallowed
we can't have swallowed
you can't have swallowed
they can't have swallowed	I can't have been swallowing
you can't have been swallowing
he can't have been swallowing
we can't have been swallowing
you can't have been swallowing
they can't have been swallowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I swallow?
can you swallow?
can he swallow?
can we swallow?
can you swallow?
can they swallow? 	can I be swallowing?
can you be swallowing?
can he be swallowing?
can we be swallowing?
can you be swallowing?
can they be swallowing? 	can I have swallowed?
can you have swallowed?
can he have swallowed?
can we have swallowed?
can you have swallowed?
can they have swallowed? 	can I have been swallowing?
can you have been swallowing?
can he have been swallowing?
can we have been swallowing?
can you have been swallowing?
can they have been swallowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I swallow?
can't you swallow?
can't he swallow?
can't we swallow?
can't you swallow?
can't they swallow? 	can't I be swallowing?
can't you be swallowing?
can't he be swallowing?
can't we be swallowing?
can't you be swallowing?
can't they be swallowing? 	can't I have swallowed?
can't you have swallowed?
can't he have swallowed?
can't we have swallowed?
can't you have swallowed?
can't they have swallowed? 	can't I have been swallowing?
can't you have been swallowing?
can't he have been swallowing?
can't we have been swallowing?
can't you have been swallowing?
can't they have been swallowing?