Bet

1) use

I bet (you) can be used in an informal style to mean 'I think it's probable that'. That is usually dropped:

I bet (you) she's not at home.
(More natural than I bet (you) that she's not at home.)

2) tenses

After I bet (you), we often use a present tense to refer to the future:

I bet (you) they don't come this evening, (or I bet (you) they won't come...)

I bet (you) the Conservatives (will) lose.

3) two objects

When bet is used to talk about real bets, it can be followed by two objects: the person with whom the bet is made, and the money or thing that is bet:

I bet you $5 it doesn 't rain this week.

My father bet my mother dinner at the Ritz that she would marry him.

He won, but she never bought him the dinner.