`->` I am studying English as I want to read books in English.

`@` S + V (kết quả) + as/ because/ since + S + V (nguyên nhân): vì, bởi vì

`->` I am studying English so that I can read books in English.

`@` so that/ in order that + S + V : để mà

`=>` Chỉ mục đích.

`->` I am studying English for I want to read books in English.

`@` S + V (kết quả) + for/ because + S + V (nguyên nhân): vì, bởi vì

`->` I am studying English will a view to reading books in English.

`@` will a view to V-ing: với mục đích làm gì

I am studying English so as to read books in English ( để mà)

hoặc: I am studying English as I am studying English ( bởi vì)

I am studying English so/ in order that I read books in English (để mà) 

I am studying English for I want to read books in English ( bởi vì)

I am studying English with a view to reading books in English ( với mục đích, để mà)