【thinking】 about the way to write a natural sentence

 When I write a sentence in English, I first find the sentence pattern and decide on its tense, and then I create each part of it. But in this way, I often cannot make natural sentence. 
 It's not the same between the sentences that have logically correct structure and those that are generally used. So, I feel that what I need to write English is not understanding of grammar but the ability to find a syntax to suit the contents of what we want to express.

 I think this looks like the theory of harmony.
 It is systemized almost perfectly. We can make harmony as not too bad from only the rules of this theory but can't ensure to make good one. Practically, there is patterns used often and we can make good one by use this. The theory is only rules after all and the one what knows the most about something that humans use is humans.
 The point that English is still better than music is that I can know these patterns by using Japanese. In music, what I can do is to feel and understand based only on what I hear, and afterward, I will become to think about semantics(意味論) or agnosticism(不可知論).

 Return to the topic, the other thing what I thought is that that is the same about using of Japanese. I often thinking about the structure of Japanese sentence and the logic of what I want to say. So, this way may be useful to use Japanese too.

In English, as far as I've used, "what" and "that" is useful.