Conjugación del verbo inglés
CAN CONCENTRATE

Verbo regular: concentrate - concentrated - concentrated

Afirmación

Forma simple	Forma con V-ing
I can concentrate you can concentrate he can concentrate we can concentrate you can concentrate they can concentrate	I can be concentrating you can be concentrating he can be concentrating we can be concentrating you can be concentrating they can be concentrating
Perfecto	Perfecto con V-ing
I can have concentrated you can have concentrated he can have concentrated we can have concentrated you can have concentrated they can have concentrated	I can have been concentrating you can have been concentrating he can have been concentrating we can have been concentrating you can have been concentrating they can have been concentrating

Negación

Forma simple	Forma con V-ing
I can't concentrate you can't concentrate he can't concentrate we can't concentrate you can't concentrate they can't concentrate	I can't be concentrating you can't be concentrating he can't be concentrating we can't be concentrating you can't be concentrating they can't be concentrating
Perfecto	Perfecto con V-ing
I can't have concentrated you can't have concentrated he can't have concentrated we can't have concentrated you can't have concentrated they can't have concentrated	I can't have been concentrating you can't have been concentrating he can't have been concentrating we can't have been concentrating you can't have been concentrating they can't have been concentrating

Forma interrogativa

Forma simple	Forma con V-ing
can I concentrate? can you concentrate? can he concentrate? can we concentrate? can you concentrate? can they concentrate?	can I be concentrating? can you be concentrating? can he be concentrating? can we be concentrating? can you be concentrating? can they be concentrating?
Perfecto	Perfecto con V-ing
can I have concentrated? can you have concentrated? can he have concentrated? can we have concentrated? can you have concentrated? can they have concentrated?	can I have been concentrating? can you have been concentrating? can he have been concentrating? can we have been concentrating? can you have been concentrating? can they have been concentrating?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I concentrate? can't you concentrate? can't he concentrate? can't we concentrate? can't you concentrate? can't they concentrate?	can't I be concentrating? can't you be concentrating? can't he be concentrating? can't we be concentrating? can't you be concentrating? can't they be concentrating?
Perfecto	Perfecto con V-ing
can't I have concentrated? can't you have concentrated? can't he have concentrated? can't we have concentrated? can't you have concentrated? can't they have concentrated?	can't I have been concentrating? can't you have been concentrating? can't he have been concentrating? can't we have been concentrating? can't you have been concentrating? can't they have been concentrating?