Conjugación del verbo inglés
CAN DUCK

Verbo regular: duck - ducked - ducked

Afirmación

Forma simple	Forma con V-ing
I can duck you can duck she can duck we can duck you can duck they can duck	I can be ducking you can be ducking she can be ducking we can be ducking you can be ducking they can be ducking
Perfecto	Perfecto con V-ing
I can have ducked you can have ducked she can have ducked we can have ducked you can have ducked they can have ducked	I can have been ducking you can have been ducking she can have been ducking we can have been ducking you can have been ducking they can have been ducking

Negación

Forma simple	Forma con V-ing
I can't duck you can't duck she can't duck we can't duck you can't duck they can't duck	I can't be ducking you can't be ducking she can't be ducking we can't be ducking you can't be ducking they can't be ducking
Perfecto	Perfecto con V-ing
I can't have ducked you can't have ducked she can't have ducked we can't have ducked you can't have ducked they can't have ducked	I can't have been ducking you can't have been ducking she can't have been ducking we can't have been ducking you can't have been ducking they can't have been ducking

Forma interrogativa

Forma simple	Forma con V-ing
can I duck? can you duck? can she duck? can we duck? can you duck? can they duck?	can I be ducking? can you be ducking? can she be ducking? can we be ducking? can you be ducking? can they be ducking?
Perfecto	Perfecto con V-ing
can I have ducked? can you have ducked? can she have ducked? can we have ducked? can you have ducked? can they have ducked?	can I have been ducking? can you have been ducking? can she have been ducking? can we have been ducking? can you have been ducking? can they have been ducking?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I duck? can't you duck? can't she duck? can't we duck? can't you duck? can't they duck?	can't I be ducking? can't you be ducking? can't she be ducking? can't we be ducking? can't you be ducking? can't they be ducking?
Perfecto	Perfecto con V-ing
can't I have ducked? can't you have ducked? can't she have ducked? can't we have ducked? can't you have ducked? can't they have ducked?	can't I have been ducking? can't you have been ducking? can't she have been ducking? can't we have been ducking? can't you have been ducking? can't they have been ducking?