Fix several English-language typos in README

docs/README-EN.adoc

@@ -13,7 +13,7 @@ The documentation for LoongArch.
 
 * You can find all historical versions https://github.com/loongson/LoongArch-Documentation/releases[here].
 
-The HTML versions are more readable than the PDF versions, not only because there exists tables of excessive length, but also because the theme of HTML versions is easier to customize.
+The HTML versions are more readable than the PDF versions, not only because there exist tables of excessive length, but also because the theme of HTML versions is easier to customize.
 To make it easier to download, each HTML page contains embedded CSS and images.
 
 == Documents
@@ -60,7 +60,7 @@ Due to the limited knowledge of the translators, there are some inevitable error
 
 _P.S._ Since the academic level of the original authors is extraordinary high, words and phrases in the original documents are so profound that the translators with limited knowledge could not express them accurately even if they tried their best.
 
-== Getting Start
+== Getting Started
 
 We *strongly recommend* that you develop on Linux/UNIX or macOS.
 If you want to develop on Windows, see <<Developing on Windows>> first.
@@ -137,7 +137,7 @@ If you submit a pull request, you can see the preview version https://loongson.g
 Please follow the link:style-guide-EN.html[Style Guide] when writing documents.
 
 The HTML versions of documents will be deployed automatically, while the PDF versions will be published manually.
-If you find an issue about the documents as found on the https://github.com/loongson/LoongArch-Documentation/releases[release page], please cross-check that it is still present in this repo.
+If you find an issue in the documents as found on the https://github.com/loongson/LoongArch-Documentation/releases[release page], please cross-check that it is still present in this repo.
 The issue may have already been corrected, but the changes have not been published yet.
 
 Branch `gh-pages` is generated by https://docs.github.com/en/actions[Github Actions], which is used to publish a project site by https://docs.github.com/en/pages[Github Pages].
@@ -147,7 +147,7 @@ So you should not modify this branch directly.
 
 * This project was inspired by https://github.com/progit/progit2[Pro Git, Second Edition].
 
-* This project use https://asciidoctor.org[Asciidoctor] to generate HTML documents, and use https://github.com/asciidoctor/asciidoctor-pdf[Asciidoctor PDF] to generate PDF documents.
+* This project uses https://asciidoctor.org[Asciidoctor] to generate HTML documents, and https://github.com/asciidoctor/asciidoctor-pdf[Asciidoctor PDF] to generate PDF documents.
 
 * See https://docs.asciidoctor.org/asciidoc/latest[AsciiDoc Language Documentation] for AsciiDoc syntax.