diff --git a/pep-0400.txt b/pep-0400.txt
index 88ec1d03c..baf5e4afe 100644
--- a/pep-0400.txt
+++ b/pep-0400.txt
@@ -19,7 +19,7 @@ StreamReaderWriter. Duplicate code means that bugs should be fixed
 twice and that we may have subtle differences between the two
 implementations.
 
-The codecs modules was introduced in Python 2.0, see the PEP 100. The
+The codecs module was introduced in Python 2.0, see the PEP 100. The
 io module was introduced in Python 2.6 and 3.0 (see the PEP 3116), and
 reimplemented in C in Python 2.7 and 3.1.
 
@@ -143,10 +143,10 @@ TextIOWrapper issues
 Possible improvements of StreamReader and StreamWriter
 ''''''''''''''''''''''''''''''''''''''''''''''''''''''
 
-It would be possible to add functions to StreamReader and StreamWriter
-to give access to the state of codec. And so it would be possible fix
-issues with stateful codecs in a base class instead of having to fix
-them is each stateful StreamReader and StreamWriter classes.
+By adding codec state read/write functions to the StreamReader and
+StreamWriter classes, it will become possible to fix issues with
+stateful codecs in a base class instead of in each stateful
+StreamReader and StreamWriter classes.
 
 It would be possible to change StreamReader and StreamWriter to make
 them use IncrementalDecoder and IncrementalEncoder.
@@ -196,9 +196,9 @@ codecs.open() is kept for backward compatibility with Python 2.
 Deprecate StreamReader and StreamWriter
 '''''''''''''''''''''''''''''''''''''''
 
-Instanciate StreamReader or StreamWriter must raise a
-DeprecationWarning in Python 3.3. Implement a subclass don't raise a
-DeprecationWarning.
+Instanciating StreamReader or StreamWriter must raise a
+DeprecationWarning in Python 3.3. Implementing a subclass doesn't
+raise a DeprecationWarning.
 
 codecs.open() will be changed to reuse the builtin open() function
 (TextIOWrapper).