表示感谢的

it's very nice/sweet/kind of you to do that; i appriciate it very much 等

表示主动帮助他人的

can I help you? is there anything i can do for you? what can I do for you? 等

表示道歉的

I am so sorry; I applogized for something; can you forgive me ? Is there anything i can do to make it up to you?

表示欣喜快乐的

I am so happy for you; let's celebrate for something....

表示鼓励的

You can do it; You can make it; believe in yourself; I believe in you;

表示开始着手做某事

Let's get it started; let's do it;甚至是let's rock it.

希望可以帮到你

have a nice day