could tip
Verbo regular: tip - tipped- tipped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could tip
you could tip
he could tip
we could tip
you could tip
they could tip 	I could be tipping
you could be tipping
he could be tipping
we could be tipping
you could be tipping
they could be tipping	I could have tipped
you could have tipped
he could have tipped
we could have tipped
you could have tipped
they could have tipped	I could have been tipping
you could have been tipping
he could have been tipping
we could have been tipping
you could have been tipping
they could have been tipping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not tip
you could not tip
he could not tip
we could not tip
you could not tip
they could not tip 	I could not be tipping
you could not be tipping
he could not be tipping
we could not be tipping
you could not be tipping
they could not be tipping	I could not have tipped
you could not have tipped
he could not have tipped
we could not have tipped
you could not have tipped
they could not have tipped	I could not have been tipping
you could not have been tipping
he could not have been tipping
we could not have been tipping
you could not have been tipping
they could not have been tipping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I tip?
could you tip?
could he tip?
could we tip?
could you tip?
could they tip? 	could I be tipping?
could you be tipping?
could he be tipping?
could we be tipping?
could you be tipping?
could they be tipping? 	could I have tipped?
could you have tipped?
could he have tipped?
could we have tipped?
could you have tipped?
could they have tipped? 	could I have been tipping?
could you have been tipping?
could he have been tipping?
could we have been tipping?
could you have been tipping?
could they have been tipping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not tip?
could you not tip?
could he not tip?
could we not tip?
could you not tip?
could they not tip? 	could I not be tipping?
could you not be tipping?
could he not be tipping?
could we not be tipping?
could you not be tipping?
could they not be tipping? 	could I not have tipped?
could you not have tipped?
could he not have tipped?
could we not have tipped?
could you not have tipped?
could they not have tipped? 	could I not have been tipping?
could you not have been tipping?
could he not have been tipping?
could we not have been tipping?
could you not have been tipping?
could they not have been tipping?