AFor as long as I've practiced English, I am always confused on how to use these phrases, so I will try to make some sentences with them.

As far as I know, I can speak more natural sentencesly when practicing the grammar.

Or: As far as I know, I can make more natural sentences when practicing grammar.

I am able to make sentences with these phrases as long as I use a dictionary.

ButHowever, I am not still used to speaking as much as I know.

Phrase Practice (as ~... as)

We tend to use ~ in maths to say "roughly..." e.g. ~7 (roughly 7)

As long as I practice English, I will always be confuse to used using these phrases, so I will try to make some sentences with them.

Since you are talking about learning English now and into the future, you need to use the future tense, "I will always be confused"

I think learning grammar is important as well as learning speaking.

It would sound more natural to remove "learning" but you could say "practicing speaking" or "learning to speak"

As far as I know, I can speaksound more natural sentences when practicing the grammar.

I am able to make sentences with the phrases as long as I use a dictionary.

But I am not still not used to speaking as much (as I know.can.)

I will keep practicing them.