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 could not flow flow you could not flow flow he could not flow flow we could not flow flow you could not flow flow they could not flow flow
V-ing form
I could not be flow flowing you could not be flow flowing he could not be flow flowing we could not be flow flowing you could not be flow flowing they could not be flow flowing
Perfect
I could not have flow flowed you could not have flow flowed he could not have flow flowed we could not have flow flowed you could not have flow flowed they could not have flow flowed
V-ing perfect
I could not have been flow flowing you could not have been flow flowing he could not have been flow flowing we could not have been flow flowing you could not have been flow flowing they could not 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
could I not flow flow? could you not flow flow? could he not flow flow? could we not flow flow? could you not flow flow? could they not flow flow?
V-ing form
could I not be flow flowing? could you not be flow flowing? could he not be flow flowing? could we not be flow flowing? could you not be flow flowing? could they not be flow flowing?
Perfect
could I not have flow flowed? could you not have flow flowed? could he not have flow flowed? could we not have flow flowed? could you not have flow flowed? could they not have flow flowed?
V-ing perfect
could I not have been flow flowing? could you not have been flow flowing? could he not have been flow flowing? could we not have been flow flowing? could you not have been flow flowing? could they not have been flow flowing?