“What do you want to know?
As I know, there are three periods of English such as "Early English", "Middle English" and "Current English".

Early English
It's not too many regular grammar and always has the exceptional situation. But the sentence structure is S+V+O as well. Early English is most diffcult to comprehense as well as read.

Middle English
The iregularly grammar is less than Early English. However, it's so hard to read and write. The features of Middle English are some Althebet being strenght symbols. For example, One word can explain 2 opposite meaning. That's girl refers to LITTLE MALE and LITTLE LADY. In the period of Middle English, the syntax is similar to Current English. Just few rules and spellings are different.
All in all, Early English mosly unknown including grammar, read and comprehension. We are now studying Old English is Middle English or between Early English and Middle English.”

“古代英語
　　概述
　　簡單的說，英語語源其實是德語，因為最早的英國人是日爾曼民族的一支但是後來這個民族曾經被很多個民族征服過，所以它包含了很多外來詞彙，其實很多又難又拗口的詞多數來自拉丁語和法語，所以一定程度造成了英語的發音規則的混亂。
　　古代英語的發音很簡單的，發音規則當然也很簡單，漸漸的英語才變得很複雜，並且發音規則也很讓人很弄不清楚。
”