Conjugación del verbo inglés
CAN FRET

Verbo regular: fret - fretted - fretted

Afirmación

Forma simple	Forma con V-ing
I can fret you can fret she can fret we can fret you can fret they can fret	I can be fretting you can be fretting she can be fretting we can be fretting you can be fretting they can be fretting
Perfecto	Perfecto con V-ing
I can have fretted you can have fretted she can have fretted we can have fretted you can have fretted they can have fretted	I can have been fretting you can have been fretting she can have been fretting we can have been fretting you can have been fretting they can have been fretting

Negación

Forma simple	Forma con V-ing
I can't fret you can't fret she can't fret we can't fret you can't fret they can't fret	I can't be fretting you can't be fretting she can't be fretting we can't be fretting you can't be fretting they can't be fretting
Perfecto	Perfecto con V-ing
I can't have fretted you can't have fretted she can't have fretted we can't have fretted you can't have fretted they can't have fretted	I can't have been fretting you can't have been fretting she can't have been fretting we can't have been fretting you can't have been fretting they can't have been fretting

Forma interrogativa

Forma simple	Forma con V-ing
can I fret? can you fret? can she fret? can we fret? can you fret? can they fret?	can I be fretting? can you be fretting? can she be fretting? can we be fretting? can you be fretting? can they be fretting?
Perfecto	Perfecto con V-ing
can I have fretted? can you have fretted? can she have fretted? can we have fretted? can you have fretted? can they have fretted?	can I have been fretting? can you have been fretting? can she have been fretting? can we have been fretting? can you have been fretting? can they have been fretting?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I fret? can't you fret? can't she fret? can't we fret? can't you fret? can't they fret?	can't I be fretting? can't you be fretting? can't she be fretting? can't we be fretting? can't you be fretting? can't they be fretting?
Perfecto	Perfecto con V-ing
can't I have fretted? can't you have fretted? can't she have fretted? can't we have fretted? can't you have fretted? can't they have fretted?	can't I have been fretting? can't you have been fretting? can't she have been fretting? can't we have been fretting? can't you have been fretting? can't they have been fretting?