Conjugación del verbo inglés
CAN SING

Verbo irregular: sing - sang - sung

Afirmación

Forma simple	Forma con V-ing
I can sing you can sing she can sing we can sing you can sing they can sing	I can be singing you can be singing she can be singing we can be singing you can be singing they can be singing
Perfecto	Perfecto con V-ing
I can have sung you can have sung she can have sung we can have sung you can have sung they can have sung	I can have been singing you can have been singing she can have been singing we can have been singing you can have been singing they can have been singing

Negación

Forma simple	Forma con V-ing
I can't sing you can't sing she can't sing we can't sing you can't sing they can't sing	I can't be singing you can't be singing she can't be singing we can't be singing you can't be singing they can't be singing
Perfecto	Perfecto con V-ing
I can't have sung you can't have sung she can't have sung we can't have sung you can't have sung they can't have sung	I can't have been singing you can't have been singing she can't have been singing we can't have been singing you can't have been singing they can't have been singing

Forma interrogativa

Forma simple	Forma con V-ing
can I sing? can you sing? can she sing? can we sing? can you sing? can they sing?	can I be singing? can you be singing? can she be singing? can we be singing? can you be singing? can they be singing?
Perfecto	Perfecto con V-ing
can I have sung? can you have sung? can she have sung? can we have sung? can you have sung? can they have sung?	can I have been singing? can you have been singing? can she have been singing? can we have been singing? can you have been singing? can they have been singing?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I sing? can't you sing? can't she sing? can't we sing? can't you sing? can't they sing?	can't I be singing? can't you be singing? can't she be singing? can't we be singing? can't you be singing? can't they be singing?
Perfecto	Perfecto con V-ing
can't I have sung? can't you have sung? can't she have sung? can't we have sung? can't you have sung? can't they have sung?	can't I have been singing? can't you have been singing? can't she have been singing? can't we have been singing? can't you have been singing? can't they have been singing?