could titivate
Verbo regular: titivate - titivated- titivated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could titivate
you could titivate
he could titivate
we could titivate
you could titivate
they could titivate 	I could be titivating
you could be titivating
he could be titivating
we could be titivating
you could be titivating
they could be titivating	I could have titivated
you could have titivated
he could have titivated
we could have titivated
you could have titivated
they could have titivated	I could have been titivating
you could have been titivating
he could have been titivating
we could have been titivating
you could have been titivating
they could have been titivating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't titivate
you couldn't titivate
he couldn't titivate
we couldn't titivate
you couldn't titivate
they couldn't titivate 	I couldn't be titivating
you couldn't be titivating
he couldn't be titivating
we couldn't be titivating
you couldn't be titivating
they couldn't be titivating	I couldn't have titivated
you couldn't have titivated
he couldn't have titivated
we couldn't have titivated
you couldn't have titivated
they couldn't have titivated	I couldn't have been titivating
you couldn't have been titivating
he couldn't have been titivating
we couldn't have been titivating
you couldn't have been titivating
they couldn't have been titivating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I titivate?
could you titivate?
could he titivate?
could we titivate?
could you titivate?
could they titivate? 	could I be titivating?
could you be titivating?
could he be titivating?
could we be titivating?
could you be titivating?
could they be titivating? 	could I have titivated?
could you have titivated?
could he have titivated?
could we have titivated?
could you have titivated?
could they have titivated? 	could I have been titivating?
could you have been titivating?
could he have been titivating?
could we have been titivating?
could you have been titivating?
could they have been titivating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I titivate?
couldn't you titivate?
couldn't he titivate?
couldn't we titivate?
couldn't you titivate?
couldn't they titivate? 	couldn't I be titivating?
couldn't you be titivating?
couldn't he be titivating?
couldn't we be titivating?
couldn't you be titivating?
couldn't they be titivating? 	couldn't I have titivated?
couldn't you have titivated?
couldn't he have titivated?
couldn't we have titivated?
couldn't you have titivated?
couldn't they have titivated? 	couldn't I have been titivating?
couldn't you have been titivating?
couldn't he have been titivating?
couldn't we have been titivating?
couldn't you have been titivating?
couldn't they have been titivating?