Reflection about new learning.

What? I've learned how to use complex sentences and you have to use a conjunction.

So what? To make a complex sentence you have to have a sentence like for example  the dog danced. Then you have to put and conjunction. Then you have to put in another sentence like for example the dog cried then you have to write a sentence the put the conjunction in the middle then you put another sentence then you have a complex sentence.
The sentence: The dog danced while he cried.

Now what? And now I know how to make a complex sentence I might put it in most of my writings.