could incubate
Verbo regular: incubate - incubated- incubated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could incubate
you could incubate
he could incubate
we could incubate
you could incubate
they could incubate 	I could be incubating
you could be incubating
he could be incubating
we could be incubating
you could be incubating
they could be incubating	I could have incubated
you could have incubated
he could have incubated
we could have incubated
you could have incubated
they could have incubated	I could have been incubating
you could have been incubating
he could have been incubating
we could have been incubating
you could have been incubating
they could have been incubating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't incubate
you couldn't incubate
he couldn't incubate
we couldn't incubate
you couldn't incubate
they couldn't incubate 	I couldn't be incubating
you couldn't be incubating
he couldn't be incubating
we couldn't be incubating
you couldn't be incubating
they couldn't be incubating	I couldn't have incubated
you couldn't have incubated
he couldn't have incubated
we couldn't have incubated
you couldn't have incubated
they couldn't have incubated	I couldn't have been incubating
you couldn't have been incubating
he couldn't have been incubating
we couldn't have been incubating
you couldn't have been incubating
they couldn't have been incubating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I incubate?
could you incubate?
could he incubate?
could we incubate?
could you incubate?
could they incubate? 	could I be incubating?
could you be incubating?
could he be incubating?
could we be incubating?
could you be incubating?
could they be incubating? 	could I have incubated?
could you have incubated?
could he have incubated?
could we have incubated?
could you have incubated?
could they have incubated? 	could I have been incubating?
could you have been incubating?
could he have been incubating?
could we have been incubating?
could you have been incubating?
could they have been incubating? 	

Forma interro-negativa 	
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couldn't I incubate?
couldn't you incubate?
couldn't he incubate?
couldn't we incubate?
couldn't you incubate?
couldn't they incubate? 	couldn't I be incubating?
couldn't you be incubating?
couldn't he be incubating?
couldn't we be incubating?
couldn't you be incubating?
couldn't they be incubating? 	couldn't I have incubated?
couldn't you have incubated?
couldn't he have incubated?
couldn't we have incubated?
couldn't you have incubated?
couldn't they have incubated? 	couldn't I have been incubating?
couldn't you have been incubating?
couldn't he have been incubating?
couldn't we have been incubating?
couldn't you have been incubating?
couldn't they have been incubating?