Use this pattern whenever you wish to express your intention to do or not to do something.

只要你想表达是否打算做某事，都能使用这个句型。

I will 课堂 - SpeakingMax英语口语达人

Use this pattern in any situation where you want to explain you've done it before.

当你想解释之前已经做过某事的时候，可以在各种情形下使用这个句型。

I've already 课堂 - SpeakingMax英语口语达人

I'd better is a great pattern to use in sentences when you're talking about something that you'd like to do.

在谈论你很乐意做某事时，你可以使用“I'd better”句型。

I'd better 课堂 - SpeakingMax英语口语达人

So use the "would you please" pattern if you're asking for something in perhaps a potentially abrasive situation.

所以，当你在可能伤人感情的情况下请求别人做某事时，你可以使用“would you please”句型。

Would you please 课堂 - SpeakingMax英语口语达人

You use the "let's" pattern when you suggest to a friend, a colleague or to anybody that you do something a certain way.

当你在向朋友、同事或任何其他人提出建议，希望大家以某种方式做某事的时候，你可以使用“let's”句型。

Let's 课堂 - SpeakingMax英语口语达人

which means that when you say "I'll", you are expressing your intention to do something.

当你使用 "I'll" 的说法时，你是想表示要做某事。

I will 课堂 - SpeakingMax英语口语达人