could fizzle
Regular verb: fizzle - fizzled- fizzled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fizzle
you could fizzle
she could fizzle
we could fizzle
you could fizzle
they could fizzle 	I could be fizzling
you could be fizzling
she could be fizzling
we could be fizzling
you could be fizzling
they could be fizzling	I could have fizzled
you could have fizzled
she could have fizzled
we could have fizzled
you could have fizzled
they could have fizzled	I could have been fizzling
you could have been fizzling
she could have been fizzling
we could have been fizzling
you could have been fizzling
they could have been fizzling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fizzle
you couldn't fizzle
she couldn't fizzle
we couldn't fizzle
you couldn't fizzle
they couldn't fizzle 	I couldn't be fizzling
you couldn't be fizzling
she couldn't be fizzling
we couldn't be fizzling
you couldn't be fizzling
they couldn't be fizzling	I couldn't have fizzled
you couldn't have fizzled
she couldn't have fizzled
we couldn't have fizzled
you couldn't have fizzled
they couldn't have fizzled	I couldn't have been fizzling
you couldn't have been fizzling
she couldn't have been fizzling
we couldn't have been fizzling
you couldn't have been fizzling
they couldn't have been fizzling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fizzle?
could you fizzle?
could she fizzle?
could we fizzle?
could you fizzle?
could they fizzle? 	could I be fizzling?
could you be fizzling?
could she be fizzling?
could we be fizzling?
could you be fizzling?
could they be fizzling? 	could I have fizzled?
could you have fizzled?
could she have fizzled?
could we have fizzled?
could you have fizzled?
could they have fizzled? 	could I have been fizzling?
could you have been fizzling?
could she have been fizzling?
could we have been fizzling?
could you have been fizzling?
could they have been fizzling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fizzle?
couldn't you fizzle?
couldn't she fizzle?
couldn't we fizzle?
couldn't you fizzle?
couldn't they fizzle? 	couldn't I be fizzling?
couldn't you be fizzling?
couldn't she be fizzling?
couldn't we be fizzling?
couldn't you be fizzling?
couldn't they be fizzling? 	couldn't I have fizzled?
couldn't you have fizzled?
couldn't she have fizzled?
couldn't we have fizzled?
couldn't you have fizzled?
couldn't they have fizzled? 	couldn't I have been fizzling?
couldn't you have been fizzling?
couldn't she have been fizzling?
couldn't we have been fizzling?
couldn't you have been fizzling?
couldn't they have been fizzling?