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Source: https://writers.stackexchange.com/a/4786
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/

Source: https://writers.stackexchange.com/a/4786
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/

I commend you for wanting to improve your writing. :) You can look at how other people have edited your questions and compare the changes. For example, in your question above:

> I'm a member of some SE sites, like SO **and** CSTheory.

You need "and" between two items in a list. You need to end a sentence with a period.

> In those sites I'm **an** active member.

Indefinite article before the noun. You then have a string of clauses which should be separated into sentences.

> I'm reading Q&A **and** also answering some Q or asking Q, but I think my writing is very poor.

Join the two clauses with "and."

> I like to write letter **s** without thinking about grammar (like **a** child), but I think I'm **a** very bad writer, because too many times my questions and answers **are being** edited.

You've written many posts (letters), so make that plural. You are referring to "child" and "writer" as generics, so use the indefinite article. Change the tense so it's not happening in the future, but describing a generic event which happens repeatedly.

You get the idea. (I also changed the title of your question because you are asking about how to improve the writing of _any_ question, not just technical ones.)

Other than that, read a lot and study how sentences are constructed.

Original score: 6