you bet 是口语,表示当然,一定.而i bet 不是,需要在后面接从句,才能够曾一个完整的句子如,i bet he will not come.
bet 的短语,bet on sth对某事打赌 bet against sth 打赌断定某事不可能 accept（take up) a bet同意打赌
make a bet with sb与某人打赌
you bet 是口语,表示当然,一定.而i bet 不是,需要在后面接从句,才能够曾一个完整的句子如,i bet he will not come.
bet 的短语,bet on sth对某事打赌 bet against sth 打赌断定某事不可能 accept（take up) a bet同意打赌
make a bet with sb与某人打赌