Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could fizz. fizzle you could fizz. fizzle he could fizz. fizzle we could fizz. fizzle you could fizz. fizzle they could fizz. fizzle
V-ing form
I could be fizz. fizzling you could be fizz. fizzling he could be fizz. fizzling we could be fizz. fizzling you could be fizz. fizzling they could be fizz. fizzling
Perfect
I could have fizz. fizzled you could have fizz. fizzled he could have fizz. fizzled we could have fizz. fizzled you could have fizz. fizzled they could have fizz. fizzled
V-ing perfect
I could have been fizz. fizzling you could have been fizz. fizzling he could have been fizz. fizzling we could have been fizz. fizzling you could have been fizz. fizzling they could have been fizz. fizzling
Negation
Simple form
I could not fizz. fizzle you could not fizz. fizzle he could not fizz. fizzle we could not fizz. fizzle you could not fizz. fizzle they could not fizz. fizzle
V-ing form
I could not be fizz. fizzling you could not be fizz. fizzling he could not be fizz. fizzling we could not be fizz. fizzling you could not be fizz. fizzling they could not be fizz. fizzling
Perfect
I could not have fizz. fizzled you could not have fizz. fizzled he could not have fizz. fizzled we could not have fizz. fizzled you could not have fizz. fizzled they could not have fizz. fizzled
V-ing perfect
I could not have been fizz. fizzling you could not have been fizz. fizzling he could not have been fizz. fizzling we could not have been fizz. fizzling you could not have been fizz. fizzling they could not have been fizz. fizzling
Interrogative form
Simple form
could I fizz. fizzle? could you fizz. fizzle? could he fizz. fizzle? could we fizz. fizzle? could you fizz. fizzle? could they fizz. fizzle?
V-ing form
could I be fizz. fizzling? could you be fizz. fizzling? could he be fizz. fizzling? could we be fizz. fizzling? could you be fizz. fizzling? could they be fizz. fizzling?
Perfect
could I have fizz. fizzled? could you have fizz. fizzled? could he have fizz. fizzled? could we have fizz. fizzled? could you have fizz. fizzled? could they have fizz. fizzled?
V-ing perfect
could I have been fizz. fizzling? could you have been fizz. fizzling? could he have been fizz. fizzling? could we have been fizz. fizzling? could you have been fizz. fizzling? could they have been fizz. fizzling?
Interro-negative form
Simple form
could I not fizz. fizzle? could you not fizz. fizzle? could he not fizz. fizzle? could we not fizz. fizzle? could you not fizz. fizzle? could they not fizz. fizzle?
V-ing form
could I not be fizz. fizzling? could you not be fizz. fizzling? could he not be fizz. fizzling? could we not be fizz. fizzling? could you not be fizz. fizzling? could they not be fizz. fizzling?
Perfect
could I not have fizz. fizzled? could you not have fizz. fizzled? could he not have fizz. fizzled? could we not have fizz. fizzled? could you not have fizz. fizzled? could they not have fizz. fizzled?
V-ing perfect
could I not have been fizz. fizzling? could you not have been fizz. fizzling? could he not have been fizz. fizzling? could we not have been fizz. fizzling? could you not have been fizz. fizzling? could they not have been fizz. fizzling?