Please let me know how many are coming, if any.

请告诉我，如果有人要来的话，有多少？

Will you please let me know when it's leaving?

请告诉我它什么时候离开好吗？

If they have problems with registration, please let me know.

如果他们在注册时有问题，请告诉我。

But it's likely that we will need all of you to work this weekend so if any of you can't, please let me know as soon as possible.

但是很可能这个周末我们需要你们所有人都去工作，所以如果你们中有谁不能去，请尽快通知我。

As you only have a short stay in Shanghai, you probably will not be able to do much more sightseeing. But if I can help in any other way, please let me know.

由于您在上海只能做短暂停留，您可能无法做太多的观光。但如果我能在任何其它方面帮上您的忙，敬请告知我。

If you do please let me know.

如果您这样做了请告之我。

Please let me know how it goes.

让我知道你进行得如何。

If you disagree, please let me know.

如果你不同意的话，请让我知道。

Please let me know after you decide.

你决定后请让我知道。

If you find it, please let me know.

如果你找到了，请告诉我。

Please let me know in the comments!

在评论中告诉我吧！

Please let me know if you disagree.

如果你不同意这个观点的话请告诉我：。

Please let me know when we get to.. Street.

到了。站了请告诉我一声。

So if you have any Suggestions, please let me know!

所以如果您有什么建议，请让我知道！

If there's anything else I can do please let me know.

如果还有其它我能做的事，就请告诉我。

If anyone knows the source of this, please let me know.

如果任何人知道它的来源，请告诉我。

If you have any questions or requests, please let me know.

如果你有一些问题和请求的话，请让我知道。

If anyone else has already done this, please let me know!

如果别人已经做了这些事，请告诉我！

Please let me know the errors and I will try to fix them.

请把错误告诉我，我会试着解决这些问题。

If you know anyone else who collects them, Please let me know.

如果你知道有人收集，请告诉我。

If you've come across any other data or sources, please let me know.

如果你见到其他的任何数据或资料。请联系我。

If you discover one, please let me know so we can update this article!

如果您找到了，请告诉我，以便我们更新这篇文章！

Please let me know if there is anything I need to do before my departure.

在离开之前如果需要我做什么请告诉我。

So "Got problem call me can" becomes "Please let me know if you need help."

于是，“有问题叫我能(Got problem call me can) ”变成了“如果你需要帮助请让我知晓(Please let me knowif you need help)。”