Please let me know if you want to join us.

如果你想加入我们的话，请告诉我一声。

youdao

Please let me know in advance if you would like to join us.

如你愿意加入我们，请提早通知我。

youdao

If it already exists, please let me know. I'll join the technology sub-committee.

如果已经有这个组织了，请告诉我，我将加入其底下的技术委员会。

youdao