The importance of persistence insist 

We can’t learn English well in a short time. It We need to practice it many times a lot before we could can speak it fluently.

Recently, I received several E-mails from italki; they advise me to be persistent. should insistence,

I absolutely agree with this. I have been studying English for about ten years, but I still can’t speak it very well. I need a moment to organize my words before speaking a sentence. I considered why I can’t use English smoothly after ten years of learning. Maybe I get see the reason now!

First of all, I have not studied English in a systematic way after since I graduated. I usually read what I'm interested in today, and learn study from another book the next day tomorrow. It breaks the continuity of study and is ineffective.

Secondly, I don’t have a planning about for my English study: maybe sometimes I'll study for the whole day today, but then learn nothing in for the rest of the entire week. {or "won't study at all for the rest of the week"}

Last but not least, persistence is very important to for studying, not only to for studying English but also for everything.

In brief, I need to study in a systematic way and I need to have a clear planning for how I'm going to about learn English. The most important thing is that I need persistence insist. [or "I need to be dedicated"]

Please help me modify the composition, thanks in advance!!!

[I think you "hit the nail on the head" -- look up that idiom if you don't know it ;)]