From a7eaa6f83b51cf756b8525f8b01d5a970bc8b151 Mon Sep 17 00:00:00 2001
From: stanzhai <jasondan325@163.com>
Date: Mon, 9 Jun 2014 00:08:30 +0800
Subject: [PATCH] =?UTF-8?q?=E6=95=B4=E7=90=86=E8=AF=AD=E5=8F=A5=E5=88=97?=
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---
 source/chapter3/09_Summary_of_the_Grammar.md | 53 ++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/source/chapter3/09_Summary_of_the_Grammar.md b/source/chapter3/09_Summary_of_the_Grammar.md
index 41790bf9..148607a5 100644
--- a/source/chapter3/09_Summary_of_the_Grammar.md
+++ b/source/chapter3/09_Summary_of_the_Grammar.md
@@ -2,3 +2,56 @@
 
 ## 语句
 
+> 语句  
+*statement* → [*expression*]() ; opt  
+*statement* → [*declaration*]() ; opt  
+*statement* → [*loop-statement*]() ; opt  
+*statement* → [*branch-statement*]() ; opt  
+*statement* → [*labeled-statement*]()  
+*statement* → [*control-transfer-statement*]() ; opt  
+*statements* → [*statement statement*]() opt
+
+<p></p>
+
+> 循环语句  
+> *loop-statement* → [*for-statement*]()  
+> *loop-statement* → [*for-in-statement*]()  
+> *loop-statement* → [*while-statement*]()  
+> *loop-statement* → [*do-while-statement*]()  
+
+<p></p>
+
+> for 循环  
+> *for-statement* → **for** [*for-init*]() opt ; [*expression*]() opt ; [*expression*]() opt [*code-block*]()  
+> *for-statement* → **for** ( [*for-init*]() opt ; [*expression*]() opt ; [*expression*]() opt ) [*code-block*]()  
+> *for-init* → [*variable-declaration*]() | [*expression-list*]()   
+
+<p></p>
+
+> for-in 循环  
+> *for-in-statement* → **for** [*pattern*]() **in** [*expression*]() [*code-block*]()  
+
+<p></p>
+
+> while 循环  
+> *while-statement* → **while** [*while-condition*]() [*code-block*]()  
+> *while-condition* → [*expression*]() | [*declaration*]()  
+
+<p></p>
+
+> do-while 循环  
+> *do-while-statement* → **do** [*code-block*]() **while** [*while-condition*]()  
+
+<p></p>
+
+> 判断语句(Branch Statement)  
+> *branch-statement* → [*if-statement*]()  
+> *branch-statement* → [*switch-statement*]()  
+
+<p></p>
+
+> if 语句  
+> *if-statement* → **if** [*if-condition*]() [*code-block*]() [*else-clause*]() opt  
+> *if-condition* → [*expression*]() | [*declaration*]()  
+> *else-clause* → **else** [*code-block*]() | **else** [*if-statement*]()  
+