On utilise ces verbes
pour décrire des conclusions ou suppositions.
You must be insane to jump off a moving train.
should / ought to
He should be here in five minutes. / She ought to have bought the cabbage.
This can only be Pete driving like a maniac in our backyard.
They could be still at work or they could be in the bar next door.
She may have left already, but I can't tell for sure.
This might be the wrong way we are going.
It is seven o'clock, he will be arriving at New York just now.
Avec l' indicatif , on présente les faits comme
quelque chose de plutôt probable. Si on utilise
le subjonctif on les présente comme quelque chose
de plutôt improbable. Avec des compléments
circonstanciels comme maybe, possibly,
it's likely, it is certain, I'm sure, if I'am right
on peut aussi décrire des conclusions ou suppositions.
I assume they are at the theatre.
He presumed that she was at the hairdresser's
She guessed we were at the bar next door.
Maybe he went to the shop to get some milk.
They possibly got lost on the way to here.
if I'm right
She didn't go to school, if I'm right (if my feeling is right etc.)
if I'm not mistaken
If I am not mistaken, I would say that he has broken a leg.