它们是在不同的情况下使用的。打赌一般是两个人对某一事情的未来发展有各自的判断,在对话中比较常见。比如:我和你打赌明天他一定会来。这表示说话人很自信这件事会发生。押注一般用于赌博场所中或是股票交易所等等,比如用在拉斯维加斯的赌场里。they are used in different situations. 打赌 is usually used when two people have their own judgment on the future development of a thing. It is a common word in the dialogue. For example: I bet you that he will come tomorrow. This means that the speaker is confident it will happen. 押注 generally is used for gambling establishments, stock exchanges etc, such as in Las Vegas casinos.