could skip
Verbo regular: skip - skipped- skipped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could skip
you could skip
he could skip
we could skip
you could skip
they could skip 	I could be skipping
you could be skipping
he could be skipping
we could be skipping
you could be skipping
they could be skipping	I could have skipped
you could have skipped
he could have skipped
we could have skipped
you could have skipped
they could have skipped	I could have been skipping
you could have been skipping
he could have been skipping
we could have been skipping
you could have been skipping
they could have been skipping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't skip
you couldn't skip
he couldn't skip
we couldn't skip
you couldn't skip
they couldn't skip 	I couldn't be skipping
you couldn't be skipping
he couldn't be skipping
we couldn't be skipping
you couldn't be skipping
they couldn't be skipping	I couldn't have skipped
you couldn't have skipped
he couldn't have skipped
we couldn't have skipped
you couldn't have skipped
they couldn't have skipped	I couldn't have been skipping
you couldn't have been skipping
he couldn't have been skipping
we couldn't have been skipping
you couldn't have been skipping
they couldn't have been skipping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I skip?
could you skip?
could he skip?
could we skip?
could you skip?
could they skip? 	could I be skipping?
could you be skipping?
could he be skipping?
could we be skipping?
could you be skipping?
could they be skipping? 	could I have skipped?
could you have skipped?
could he have skipped?
could we have skipped?
could you have skipped?
could they have skipped? 	could I have been skipping?
could you have been skipping?
could he have been skipping?
could we have been skipping?
could you have been skipping?
could they have been skipping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I skip?
couldn't you skip?
couldn't he skip?
couldn't we skip?
couldn't you skip?
couldn't they skip? 	couldn't I be skipping?
couldn't you be skipping?
couldn't he be skipping?
couldn't we be skipping?
couldn't you be skipping?
couldn't they be skipping? 	couldn't I have skipped?
couldn't you have skipped?
couldn't he have skipped?
couldn't we have skipped?
couldn't you have skipped?
couldn't they have skipped? 	couldn't I have been skipping?
couldn't you have been skipping?
couldn't he have been skipping?
couldn't we have been skipping?
couldn't you have been skipping?
couldn't they have been skipping?