give one's hand on，give one's hand to，offer one's hand to,give sb. a hand和give sb/get a big hand你都会吗？请看：
（1）. give one's hand on用于商务买卖场合，表示“同意价格，保证履行契约，与……握手成交”。
He has given his hand on the bargain. 他已同意那个价格了。
（2）. give one's hand to表示“答应求婚，同意婚事，与……订婚，答应和某人结婚”，总是女方答应男方。其实我们的老祖宗早就有：牵手，表示这方面含义了。
She has given her hand to your request. 她已答应你的求婚了。
（3）.offer one's hand to表示“向……求婚”，总是男方向女方求婚。
Jim offered his hand to Mary two weeks ago. 吉姆两个星期前向玛丽求婚了。
（4）.give/ lend sb. a hand表示“帮一下忙”。
Could you give me a hand with these suitcases?
你能帮我拿一下这些手提箱吗？
He gave me a hand in moving the piano. 他帮我移动那架钢琴。
She is always willing to give a hand in case of need. 需要时她总是愿意帮忙。
When others need help, he is always ready to give/ lend a hand to them.
当他人有需要的时候，他总是随时准备好帮助他人。
（5）.give sb/get a big hand
给某人 / 受到鼓掌喝彩
Ladies and gentlemen, let's give a big hand to our special guests tonight.
女士们、先生们，让我们以热烈的掌声欢迎今晚的特邀嘉宾。
Let's give a big hand to Sally for singing so beautifully tonight.
让我们为莎莉今晚美妙而出色的演唱热烈鼓掌。
Let's give' em a big hand.
让我们为他们热烈鼓掌。《柯林斯高阶英汉双解学习词典》
（6）. show one's hand把事情的有关情况都向对方公开，表明自己的真实意图；摊牌
In business negotiations, it's important that you don't show your hand right away, or you might risk losing out on the best deal possible.
在商务谈判中，关键是不要马上摊牌，否则你可能会失去最好的交易机会。
The negotiations will not make progress as long as they refuse to show their hand.
他们要是不肯摊牌，谈判就不会有进展。