could lip-synch
Regular verb: lip-synch - lip-synched- lip-synched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could lip-synch
you could lip-synch
he could lip-synch
we could lip-synch
you could lip-synch
they could lip-synch 	I could be lip-synching
you could be lip-synching
he could be lip-synching
we could be lip-synching
you could be lip-synching
they could be lip-synching	I could have lip-synched
you could have lip-synched
he could have lip-synched
we could have lip-synched
you could have lip-synched
they could have lip-synched	I could have been lip-synching
you could have been lip-synching
he could have been lip-synching
we could have been lip-synching
you could have been lip-synching
they could have been lip-synching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't lip-synch
you couldn't lip-synch
he couldn't lip-synch
we couldn't lip-synch
you couldn't lip-synch
they couldn't lip-synch 	I couldn't be lip-synching
you couldn't be lip-synching
he couldn't be lip-synching
we couldn't be lip-synching
you couldn't be lip-synching
they couldn't be lip-synching	I couldn't have lip-synched
you couldn't have lip-synched
he couldn't have lip-synched
we couldn't have lip-synched
you couldn't have lip-synched
they couldn't have lip-synched	I couldn't have been lip-synching
you couldn't have been lip-synching
he couldn't have been lip-synching
we couldn't have been lip-synching
you couldn't have been lip-synching
they couldn't have been lip-synching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I lip-synch?
could you lip-synch?
could he lip-synch?
could we lip-synch?
could you lip-synch?
could they lip-synch? 	could I be lip-synching?
could you be lip-synching?
could he be lip-synching?
could we be lip-synching?
could you be lip-synching?
could they be lip-synching? 	could I have lip-synched?
could you have lip-synched?
could he have lip-synched?
could we have lip-synched?
could you have lip-synched?
could they have lip-synched? 	could I have been lip-synching?
could you have been lip-synching?
could he have been lip-synching?
could we have been lip-synching?
could you have been lip-synching?
could they have been lip-synching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I lip-synch?
couldn't you lip-synch?
couldn't he lip-synch?
couldn't we lip-synch?
couldn't you lip-synch?
couldn't they lip-synch? 	couldn't I be lip-synching?
couldn't you be lip-synching?
couldn't he be lip-synching?
couldn't we be lip-synching?
couldn't you be lip-synching?
couldn't they be lip-synching? 	couldn't I have lip-synched?
couldn't you have lip-synched?
couldn't he have lip-synched?
couldn't we have lip-synched?
couldn't you have lip-synched?
couldn't they have lip-synched? 	couldn't I have been lip-synching?
couldn't you have been lip-synching?
couldn't he have been lip-synching?
couldn't we have been lip-synching?
couldn't you have been lip-synching?
couldn't they have been lip-synching?