English verb conjugation
COULD LIP-SYNCH

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

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?