You will find this pattern very useful anytime you're not feeling happy about something and you want to express yourself.

你会发现，当你因为什么事感到低落，你想表达自己的感觉时，这个句型特别有用。

I get so upset 课堂 - SpeakingMax英语口语达人

And you will find this pattern useful for when you are talking about something in your memory.

当你在谈论记忆中的某事时，这个句型非常有用。

remind me of 课堂 - SpeakingMax英语口语达人

You'll find "That's all" very useful to express what you have or to put a stop to something.

你会发现 “That's all” 是个非常有用的句型。你可以用它来给一件事画个句号。

That's all课堂 - SpeakingMax英语口语达人