Coniugazione del verbo inglese
CAN REFEREE

Verbo regolare: referee - refereed - refereed

Affermazione

Forma semplice	Forma con V-ing
I can referee you can referee he can referee we can referee you can referee they can referee	I can be refereeing you can be refereeing he can be refereeing we can be refereeing you can be refereeing they can be refereeing
Perfetto	Perfetto con V-ing
I can have refereed you can have refereed he can have refereed we can have refereed you can have refereed they can have refereed	I can have been refereeing you can have been refereeing he can have been refereeing we can have been refereeing you can have been refereeing they can have been refereeing

Negazione

Forma semplice	Forma con V-ing
I can't referee you can't referee he can't referee we can't referee you can't referee they can't referee	I can't be refereeing you can't be refereeing he can't be refereeing we can't be refereeing you can't be refereeing they can't be refereeing
Perfetto	Perfetto con V-ing
I can't have refereed you can't have refereed he can't have refereed we can't have refereed you can't have refereed they can't have refereed	I can't have been refereeing you can't have been refereeing he can't have been refereeing we can't have been refereeing you can't have been refereeing they can't have been refereeing

Forma interrogativa

Forma semplice	Forma con V-ing
can I referee? can you referee? can he referee? can we referee? can you referee? can they referee?	can I be refereeing? can you be refereeing? can he be refereeing? can we be refereeing? can you be refereeing? can they be refereeing?
Perfetto	Perfetto con V-ing
can I have refereed? can you have refereed? can he have refereed? can we have refereed? can you have refereed? can they have refereed?	can I have been refereeing? can you have been refereeing? can he have been refereeing? can we have been refereeing? can you have been refereeing? can they have been refereeing?

Forma interro-negativa

Forma semplice	Forma con V-ing
can't I referee? can't you referee? can't he referee? can't we referee? can't you referee? can't they referee?	can't I be refereeing? can't you be refereeing? can't he be refereeing? can't we be refereeing? can't you be refereeing? can't they be refereeing?
Perfetto	Perfetto con V-ing
can't I have refereed? can't you have refereed? can't he have refereed? can't we have refereed? can't you have refereed? can't they have refereed?	can't I have been refereeing? can't you have been refereeing? can't he have been refereeing? can't we have been refereeing? can't you have been refereeing? can't they have been refereeing?