English verb conjugation
COULD TONGUE

Regular verb: tongue - tongued - tongued

Affirmation

Simple form	V-ing form
I could tongue you could tongue he could tongue we could tongue you could tongue they could tongue	I could be tonguing you could be tonguing he could be tonguing we could be tonguing you could be tonguing they could be tonguing
Perfect	V-ing perfect
I could have tongued you could have tongued he could have tongued we could have tongued you could have tongued they could have tongued	I could have been tonguing you could have been tonguing he could have been tonguing we could have been tonguing you could have been tonguing they could have been tonguing

Negation

Simple form	V-ing form
I couldn't tongue you couldn't tongue he couldn't tongue we couldn't tongue you couldn't tongue they couldn't tongue	I couldn't be tonguing you couldn't be tonguing he couldn't be tonguing we couldn't be tonguing you couldn't be tonguing they couldn't be tonguing
Perfect	V-ing perfect
I couldn't have tongued you couldn't have tongued he couldn't have tongued we couldn't have tongued you couldn't have tongued they couldn't have tongued	I couldn't have been tonguing you couldn't have been tonguing he couldn't have been tonguing we couldn't have been tonguing you couldn't have been tonguing they couldn't have been tonguing

Interrogative form

Simple form	V-ing form
could I tongue? could you tongue? could he tongue? could we tongue? could you tongue? could they tongue?	could I be tonguing? could you be tonguing? could he be tonguing? could we be tonguing? could you be tonguing? could they be tonguing?
Perfect	V-ing perfect
could I have tongued? could you have tongued? could he have tongued? could we have tongued? could you have tongued? could they have tongued?	could I have been tonguing? could you have been tonguing? could he have been tonguing? could we have been tonguing? could you have been tonguing? could they have been tonguing?

Interro-negative form

Simple form	V-ing form
couldn't I tongue? couldn't you tongue? couldn't he tongue? couldn't we tongue? couldn't you tongue? couldn't they tongue?	couldn't I be tonguing? couldn't you be tonguing? couldn't he be tonguing? couldn't we be tonguing? couldn't you be tonguing? couldn't they be tonguing?
Perfect	V-ing perfect
couldn't I have tongued? couldn't you have tongued? couldn't he have tongued? couldn't we have tongued? couldn't you have tongued? couldn't they have tongued?	couldn't I have been tonguing? couldn't you have been tonguing? couldn't he have been tonguing? couldn't we have been tonguing? couldn't you have been tonguing? couldn't they have been tonguing?