Coniugazione del verbo inglese CAN HAPPEN
Verbo regolare: happen - happened - happened
Affermazione
Forma semplice
--
it can happen
-
-
-
Forma con V-ing
--
it can be happening
-
-
-
Perfetto
--
it can have happened
-
-
-
Perfetto con V-ing
--
it can have been happening
-
-
-
Negazione
Forma semplice
--
it can't happen
-
-
-
Forma con V-ing
--
it can't be happening
-
-
-
Perfetto
--
it can't have happened
-
-
-
Perfetto con V-ing
--
it can't have been happening
-
-
-
Forma interrogativa
Forma semplice
--
can it happen?
-
-
-
Forma con V-ing
--
can it be happening?
-
-
-
Perfetto
--
can it have happened?
-
-
-
Perfetto con V-ing
--
can it have been happening?
-
-
-
Forma interro-negativa
Forma semplice
--
can't it happen?
-
-
-
Forma con V-ing
--
can't it be happening?
-
-
-
Perfetto
--
can't it have happened?
-
-
-
Perfetto con V-ing
--
can't it have been happening?
-
-
-