Chinese grammar语法: 的"De" (modal particle)

The particle 的 (de) is most often a structural particle, but it can also be a sentence-final particle which indicates that the speaker is certain about what he is saying. When it serves this purpose, it's expressing a type of "mood," and thus is called a "modal particle."

Basic Structure 
The structure is:

statement+的

Frequently the statement will include 会 or 肯定会 to emphasize the speaker's certainty.

Examples 

Wǒ bú huì piàn nǐ de.
我 不 会 骗 你 的。

I won't lie to you.