Conjugación del verbo inglés
CAN UNDERSTUDY

Verbo regular: understudy - understudied - understudied

Afirmación

Forma simple	Forma con V-ing
I can understudy you can understudy he can understudy we can understudy you can understudy they can understudy	I can be understudying you can be understudying he can be understudying we can be understudying you can be understudying they can be understudying
Perfecto	Perfecto con V-ing
I can have understudied you can have understudied he can have understudied we can have understudied you can have understudied they can have understudied	I can have been understudying you can have been understudying he can have been understudying we can have been understudying you can have been understudying they can have been understudying

Negación

Forma simple	Forma con V-ing
I can't understudy you can't understudy he can't understudy we can't understudy you can't understudy they can't understudy	I can't be understudying you can't be understudying he can't be understudying we can't be understudying you can't be understudying they can't be understudying
Perfecto	Perfecto con V-ing
I can't have understudied you can't have understudied he can't have understudied we can't have understudied you can't have understudied they can't have understudied	I can't have been understudying you can't have been understudying he can't have been understudying we can't have been understudying you can't have been understudying they can't have been understudying

Forma interrogativa

Forma simple	Forma con V-ing
can I understudy? can you understudy? can he understudy? can we understudy? can you understudy? can they understudy?	can I be understudying? can you be understudying? can he be understudying? can we be understudying? can you be understudying? can they be understudying?
Perfecto	Perfecto con V-ing
can I have understudied? can you have understudied? can he have understudied? can we have understudied? can you have understudied? can they have understudied?	can I have been understudying? can you have been understudying? can he have been understudying? can we have been understudying? can you have been understudying? can they have been understudying?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I understudy? can't you understudy? can't he understudy? can't we understudy? can't you understudy? can't they understudy?	can't I be understudying? can't you be understudying? can't he be understudying? can't we be understudying? can't you be understudying? can't they be understudying?
Perfecto	Perfecto con V-ing
can't I have understudied? can't you have understudied? can't he have understudied? can't we have understudied? can't you have understudied? can't they have understudied?	can't I have been understudying? can't you have been understudying? can't he have been understudying? can't we have been understudying? can't you have been understudying? can't they have been understudying?