Fix grammar for Error Type section in 11.1

en/eBook/11.1.md

@@ -15,7 +15,7 @@ Similar to the `os.Open` function, the functions in Go's standard packages all r
 
 ## Error type
 
-`error` is an interface type, with this definition:
+`error` is an interface type with the following definition:
 
     type error interface {
 		Error() string
@@ -23,6 +23,10 @@ Similar to the `os.Open` function, the functions in Go's standard packages all r
 
 `error` is a built-in interface type, we can / builtin / pack below to find the appropriate definition. And we have a lot of internal error is used inside the package packet errors following implementation structure errorString private
 
+
+
+`error` is a built-in interface type. We can find the corresponding definition in the builtin package below. We also have a lot of internal packages using the error in a private structure called `errorString`, which implements the error interface:
+
     // errorString is a trivial implementation of error.
 	type errorString struct {
 		s string
@@ -32,7 +36,7 @@ Similar to the `os.Open` function, the functions in Go's standard packages all r
 		return e.s
 	}
 
-You can `errors.New` put a string into errorString, in order to get a meet the interface error object whose internal implementation is as follows:
+You can convert a regular string to an `errorString` through `errors.New` in order to get an object that satisfies the error interface. Its internal implementation is as follows:
 
     // New returns an error that formats as the given text.
 	func New(text string) error {
@@ -48,7 +52,7 @@ The following example demonstrates how to use `errors.New`:
 		// implementation
 	}
 
-In the following example, we call the Sqrt when passing a negative number , and then you get the error object is non-nil , nil compared with this object , the result is true, so `fmt.Println` (fmt package when dealing with error calls the error method ) is called to output error , look at the following sample code to call :
+In the following example, we pass a negative number to our `Sqrt` function. Checking the `err` variable, we check whether the error object is non-nil using a simple nil comparison. The result of the comparison is true, so `fmt.Println` (the `fmt` package calls the error method when dealing with error calls) is called to output an error. 
 
     f, err := Sqrt(-1)
     if err != nil {