I'm having a party.
我要办个舞会。
Will you come to the party?
请来参加我的舞会好吗?
I invited them to the party.
我邀请他们来参加我的舞会。
I am not invited.
我没有被邀请。
I have something on.
我有事。
I'm afraid I can't make it.
我恐怕不行。
Thanks for inviting me.
谢谢你邀请我。
Drop by if you can.
如果方便就过来看看。
Want me to bring anything?
需要我带点什么过去吗?
Just bring yourself.
带你的人就好!/带上你自己就好!寥焀栀崀