could spring-clean
Verbo regular: spring-clean - spring-cleaned- spring-cleaned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could spring-clean
you could spring-clean
he could spring-clean
we could spring-clean
you could spring-clean
they could spring-clean 	I could be spring-cleaning
you could be spring-cleaning
he could be spring-cleaning
we could be spring-cleaning
you could be spring-cleaning
they could be spring-cleaning	I could have spring-cleaned
you could have spring-cleaned
he could have spring-cleaned
we could have spring-cleaned
you could have spring-cleaned
they could have spring-cleaned	I could have been spring-cleaning
you could have been spring-cleaning
he could have been spring-cleaning
we could have been spring-cleaning
you could have been spring-cleaning
they could have been spring-cleaning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't spring-clean
you couldn't spring-clean
he couldn't spring-clean
we couldn't spring-clean
you couldn't spring-clean
they couldn't spring-clean 	I couldn't be spring-cleaning
you couldn't be spring-cleaning
he couldn't be spring-cleaning
we couldn't be spring-cleaning
you couldn't be spring-cleaning
they couldn't be spring-cleaning	I couldn't have spring-cleaned
you couldn't have spring-cleaned
he couldn't have spring-cleaned
we couldn't have spring-cleaned
you couldn't have spring-cleaned
they couldn't have spring-cleaned	I couldn't have been spring-cleaning
you couldn't have been spring-cleaning
he couldn't have been spring-cleaning
we couldn't have been spring-cleaning
you couldn't have been spring-cleaning
they couldn't have been spring-cleaning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I spring-clean?
could you spring-clean?
could he spring-clean?
could we spring-clean?
could you spring-clean?
could they spring-clean? 	could I be spring-cleaning?
could you be spring-cleaning?
could he be spring-cleaning?
could we be spring-cleaning?
could you be spring-cleaning?
could they be spring-cleaning? 	could I have spring-cleaned?
could you have spring-cleaned?
could he have spring-cleaned?
could we have spring-cleaned?
could you have spring-cleaned?
could they have spring-cleaned? 	could I have been spring-cleaning?
could you have been spring-cleaning?
could he have been spring-cleaning?
could we have been spring-cleaning?
could you have been spring-cleaning?
could they have been spring-cleaning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I spring-clean?
couldn't you spring-clean?
couldn't he spring-clean?
couldn't we spring-clean?
couldn't you spring-clean?
couldn't they spring-clean? 	couldn't I be spring-cleaning?
couldn't you be spring-cleaning?
couldn't he be spring-cleaning?
couldn't we be spring-cleaning?
couldn't you be spring-cleaning?
couldn't they be spring-cleaning? 	couldn't I have spring-cleaned?
couldn't you have spring-cleaned?
couldn't he have spring-cleaned?
couldn't we have spring-cleaned?
couldn't you have spring-cleaned?
couldn't they have spring-cleaned? 	couldn't I have been spring-cleaning?
couldn't you have been spring-cleaning?
couldn't he have been spring-cleaning?
couldn't we have been spring-cleaning?
couldn't you have been spring-cleaning?
couldn't they have been spring-cleaning?