could progress
Verbo regular: progress - progressed- progressed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could progress
you could progress
she could progress
we could progress
you could progress
they could progress 	I could be progressing
you could be progressing
she could be progressing
we could be progressing
you could be progressing
they could be progressing	I could have progressed
you could have progressed
she could have progressed
we could have progressed
you could have progressed
they could have progressed	I could have been progressing
you could have been progressing
she could have been progressing
we could have been progressing
you could have been progressing
they could have been progressing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't progress
you couldn't progress
she couldn't progress
we couldn't progress
you couldn't progress
they couldn't progress 	I couldn't be progressing
you couldn't be progressing
she couldn't be progressing
we couldn't be progressing
you couldn't be progressing
they couldn't be progressing	I couldn't have progressed
you couldn't have progressed
she couldn't have progressed
we couldn't have progressed
you couldn't have progressed
they couldn't have progressed	I couldn't have been progressing
you couldn't have been progressing
she couldn't have been progressing
we couldn't have been progressing
you couldn't have been progressing
they couldn't have been progressing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I progress?
could you progress?
could she progress?
could we progress?
could you progress?
could they progress? 	could I be progressing?
could you be progressing?
could she be progressing?
could we be progressing?
could you be progressing?
could they be progressing? 	could I have progressed?
could you have progressed?
could she have progressed?
could we have progressed?
could you have progressed?
could they have progressed? 	could I have been progressing?
could you have been progressing?
could she have been progressing?
could we have been progressing?
could you have been progressing?
could they have been progressing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I progress?
couldn't you progress?
couldn't she progress?
couldn't we progress?
couldn't you progress?
couldn't they progress? 	couldn't I be progressing?
couldn't you be progressing?
couldn't she be progressing?
couldn't we be progressing?
couldn't you be progressing?
couldn't they be progressing? 	couldn't I have progressed?
couldn't you have progressed?
couldn't she have progressed?
couldn't we have progressed?
couldn't you have progressed?
couldn't they have progressed? 	couldn't I have been progressing?
couldn't you have been progressing?
couldn't she have been progressing?
couldn't we have been progressing?
couldn't you have been progressing?
couldn't they have been progressing?