The word "bet" is used to express some opinion about the future. It’s often associated with gambling or risking something of value.
In these sentences, "bet" is a verb:
simple
past
past participle
bet
bet
bet
Tony bet $20 on a horse at the racetrack.
Sandra likes to bet on the outcome of football games.
How much would you like to bet?
I’ll bet you ten dollars your team doesn’t win.
Vince bet all of his money in a poker game and lost.
When used as a verb, "bet" also means that a person has a strong belief that something is true.
I’ll bet the price of a gallon of gas will go up this summer.
What do you want to bet it rains tomorrow during the game?
They’re betting on a better future in sunny California.
In the next set of sentences and questions, the word "bet" is a noun:
Tony placed a twenty-dollar bet on a horse.
They made a good bet on the house they purchased.
What kind of a bet do you want to make?
Betting isn’t allowed in here. (The word "betting" is a gerund in this sentence.)
That was a terrible bet.
Note: The word "bet" can be used when saying "You’re welcome." When someone says "thank-you," sometimes Americans reply with, "You bet." The contracted form of this is "You betcha." (betcha = bet you)
