I could fizzle you could fizzle he could fizzle we could fizzle you could fizzle they could fizzle
V-ing form
I could be fizzling you could be fizzling he could be fizzling we could be fizzling you could be fizzling they could be fizzling
Perfect
I could have fizzled you could have fizzled he could have fizzled we could have fizzled you could have fizzled they could have fizzled
V-ing perfect
I could have been fizzling you could have been fizzling he could have been fizzling we could have been fizzling you could have been fizzling they could have been fizzling
Negation
Simple form
I could not fizzle you could not fizzle he could not fizzle we could not fizzle you could not fizzle they could not fizzle
V-ing form
I could not be fizzling you could not be fizzling he could not be fizzling we could not be fizzling you could not be fizzling they could not be fizzling
Perfect
I could not have fizzled you could not have fizzled he could not have fizzled we could not have fizzled you could not have fizzled they could not have fizzled
V-ing perfect
I could not have been fizzling you could not have been fizzling he could not have been fizzling we could not have been fizzling you could not have been fizzling they could not have been fizzling
Interrogative form
Simple form
could I fizzle? could you fizzle? could he fizzle? could we fizzle? could you fizzle? could they fizzle?
V-ing form
could I be fizzling? could you be fizzling? could he be fizzling? could we be fizzling? could you be fizzling? could they be fizzling?
Perfect
could I have fizzled? could you have fizzled? could he have fizzled? could we have fizzled? could you have fizzled? could they have fizzled?
V-ing perfect
could I have been fizzling? could you have been fizzling? could he have been fizzling? could we have been fizzling? could you have been fizzling? could they have been fizzling?
Interro-negative form
Simple form
could I not fizzle? could you not fizzle? could he not fizzle? could we not fizzle? could you not fizzle? could they not fizzle?
V-ing form
could I not be fizzling? could you not be fizzling? could he not be fizzling? could we not be fizzling? could you not be fizzling? could they not be fizzling?
Perfect
could I not have fizzled? could you not have fizzled? could he not have fizzled? could we not have fizzled? could you not have fizzled? could they not have fizzled?
V-ing perfect
could I not have been fizzling? could you not have been fizzling? could he not have been fizzling? could we not have been fizzling? could you not have been fizzling? could they not have been fizzling?