表示肯定used to give force to the statement

• 既然下了命令，坚决执行就是。

  Since this is the order, it will be resolutely carried out.

• 您放心就是了。

  You must be relieved.

• 你替他办就是了。

  You just do it for him.

表示强调used for emphasis

• 就是现在。

  Right now.

• 就是这个。

  Precisely this one.

• 我说的就是这个。

  This is what I said.

• 就是他！

  It is him!

• 确实就是这样。

  It is really like that.

• 就是不可以这样办。

  It may not be handled in this way.

• 就是这样，你写对了。

  This is right, you have written it correctly.

• 事实就是这样。

  The facts are like this.

• 我就是这样说的。

  I said it like that.

• 好就是好，不好就是不好。

  Good is good, bad is bad.

• 我就是不去。

  I am not going.

• 她唱得就是好。

  Her singing is good.

• 我找的就是你。

  You are the one I am looking for.

• 他就是不答应。

  He just didn't agree.

• 枪声就是命令

  it's the sound of gunfire that is the command

• 他一出差，就是一个月。

  Once he goes on business, it will be for one month.

表示同意used alone to express agreement

• 就是，就是，你的话很对。

  Yes, that's right. I completely agree with you.

表示假设的让步even if

• 就是难也得办。

  Even if it is difficult, it still needs to be done.

• 就是有困难，也不怎么大。

  Even if there are difficulties, they are not so big.

• 这事就是我也不知道。

  Even I do not know this.

表示不出二者之外either