could pipette
Verbo regular: pipette - pipetted- pipetted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could pipette
you could pipette
he could pipette
we could pipette
you could pipette
they could pipette 	I could be pipetting
you could be pipetting
he could be pipetting
we could be pipetting
you could be pipetting
they could be pipetting	I could have pipetted
you could have pipetted
he could have pipetted
we could have pipetted
you could have pipetted
they could have pipetted	I could have been pipetting
you could have been pipetting
he could have been pipetting
we could have been pipetting
you could have been pipetting
they could have been pipetting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't pipette
you couldn't pipette
he couldn't pipette
we couldn't pipette
you couldn't pipette
they couldn't pipette 	I couldn't be pipetting
you couldn't be pipetting
he couldn't be pipetting
we couldn't be pipetting
you couldn't be pipetting
they couldn't be pipetting	I couldn't have pipetted
you couldn't have pipetted
he couldn't have pipetted
we couldn't have pipetted
you couldn't have pipetted
they couldn't have pipetted	I couldn't have been pipetting
you couldn't have been pipetting
he couldn't have been pipetting
we couldn't have been pipetting
you couldn't have been pipetting
they couldn't have been pipetting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I pipette?
could you pipette?
could he pipette?
could we pipette?
could you pipette?
could they pipette? 	could I be pipetting?
could you be pipetting?
could he be pipetting?
could we be pipetting?
could you be pipetting?
could they be pipetting? 	could I have pipetted?
could you have pipetted?
could he have pipetted?
could we have pipetted?
could you have pipetted?
could they have pipetted? 	could I have been pipetting?
could you have been pipetting?
could he have been pipetting?
could we have been pipetting?
could you have been pipetting?
could they have been pipetting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I pipette?
couldn't you pipette?
couldn't he pipette?
couldn't we pipette?
couldn't you pipette?
couldn't they pipette? 	couldn't I be pipetting?
couldn't you be pipetting?
couldn't he be pipetting?
couldn't we be pipetting?
couldn't you be pipetting?
couldn't they be pipetting? 	couldn't I have pipetted?
couldn't you have pipetted?
couldn't he have pipetted?
couldn't we have pipetted?
couldn't you have pipetted?
couldn't they have pipetted? 	couldn't I have been pipetting?
couldn't you have been pipetting?
couldn't he have been pipetting?
couldn't we have been pipetting?
couldn't you have been pipetting?
couldn't they have been pipetting?