我过几天就要搬进去了，不知道你能不能帮忙。

I'm moving in a few days and I wonder if you could help.

youdao

我不知道你能不能帮我做作业。

I wonder whether you can help me do my work.

youdao

我不知道你能不能帮助我做作业。

I wonder if you could help me with my homework.

youdao

Man, you're going to really make me work here, I have no idea if I can get it that far, ah your friend will help you out. Thank you.

我不知道我能不能扔那么远，你的朋友会帮你的，谢谢！,那位同学完全正确。

麻省理工公开课 - 计算机科学及编程导论课程节选

I don't know if I can come to your party.

我不知道我能不能参加你的派对。

I don't know 实战 - SpeakingMax英语口语达人

I don't know if I can attend your party.

我不知道能不能参加你的派对。

I don't know 课堂 - SpeakingMax英语口语达人