Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could flow flow you could flow flow he could flow flow we could flow flow you could flow flow they could flow flow
V-ing form
I could be flow flowing you could be flow flowing he could be flow flowing we could be flow flowing you could be flow flowing they could be flow flowing
Perfect
I could have flow flowed you could have flow flowed he could have flow flowed we could have flow flowed you could have flow flowed they could have flow flowed
V-ing perfect
I could have been flow flowing you could have been flow flowing he could have been flow flowing we could have been flow flowing you could have been flow flowing they could have been flow flowing
Negation
Simple form
I couldn't flow flow you couldn't flow flow he couldn't flow flow we couldn't flow flow you couldn't flow flow they couldn't flow flow
V-ing form
I couldn't be flow flowing you couldn't be flow flowing he couldn't be flow flowing we couldn't be flow flowing you couldn't be flow flowing they couldn't be flow flowing
Perfect
I couldn't have flow flowed you couldn't have flow flowed he couldn't have flow flowed we couldn't have flow flowed you couldn't have flow flowed they couldn't have flow flowed
V-ing perfect
I couldn't have been flow flowing you couldn't have been flow flowing he couldn't have been flow flowing we couldn't have been flow flowing you couldn't have been flow flowing they couldn't have been flow flowing
Interrogative form
Simple form
could I flow flow? could you flow flow? could he flow flow? could we flow flow? could you flow flow? could they flow flow?
V-ing form
could I be flow flowing? could you be flow flowing? could he be flow flowing? could we be flow flowing? could you be flow flowing? could they be flow flowing?
Perfect
could I have flow flowed? could you have flow flowed? could he have flow flowed? could we have flow flowed? could you have flow flowed? could they have flow flowed?
V-ing perfect
could I have been flow flowing? could you have been flow flowing? could he have been flow flowing? could we have been flow flowing? could you have been flow flowing? could they have been flow flowing?
Interro-negative form
Simple form
couldn't I flow flow? couldn't you flow flow? couldn't he flow flow? couldn't we flow flow? couldn't you flow flow? couldn't they flow flow?
V-ing form
couldn't I be flow flowing? couldn't you be flow flowing? couldn't he be flow flowing? couldn't we be flow flowing? couldn't you be flow flowing? couldn't they be flow flowing?
Perfect
couldn't I have flow flowed? couldn't you have flow flowed? couldn't he have flow flowed? couldn't we have flow flowed? couldn't you have flow flowed? couldn't they have flow flowed?
V-ing perfect
couldn't I have been flow flowing? couldn't you have been flow flowing? couldn't he have been flow flowing? couldn't we have been flow flowing? couldn't you have been flow flowing? couldn't they have been flow flowing?