| Abstract | 第1-7页 |
| 摘要 | 第7-8页 |
| Abbreviations | 第8-9页 |
| Chapter 1 Brief introduction | 第9-10页 |
| Chapter 2 Theory background | 第10-18页 |
| ·Historical linguistics:language changing | 第10-14页 |
| ·Functional explanations | 第10-11页 |
| ·Psycholinguistic explanations:language acquisition | 第11页 |
| ·Sociolinguistic explanations:Labov's theory | 第11-13页 |
| ·Conclusion | 第13-14页 |
| ·Language and varieties | 第14-18页 |
| ·Formation of varieties | 第14-15页 |
| ·Regional variation | 第15-18页 |
| Chapter 3 Historical description | 第18-33页 |
| ·History of British English | 第18-24页 |
| ·Origin and development of British English | 第18-24页 |
| ·Old English.(450BC--1100BC) | 第18-21页 |
| ·Middle English(1100BC--1500BC) | 第21-23页 |
| ·Modern English(1500BC--the present) | 第23-24页 |
| ·B.E.dialects: | 第24页 |
| ·History of American English | 第24-33页 |
| ·Origin of American English:from Elizabeth English | 第25页 |
| ·Development and influence of American English | 第25-31页 |
| ·Colonial Period | 第25-27页 |
| ·Territorial Expansion and Urbanization | 第27-28页 |
| ·Development of regional speech patterns | 第28-30页 |
| ·Modern variation in American English | 第30-31页 |
| ·American English variety:Black English | 第31-33页 |
| Chapter 4 Comparative study Between American English and British English | 第33-55页 |
| ·Reasons of grammatical research | 第33-34页 |
| ·Verbs | 第34-44页 |
| ·Past tense and past participle of verbs | 第34-38页 |
| ·Have got,do have and have to | 第38-41页 |
| ·shall/should and will/would | 第41-42页 |
| ·Can't,must not and mustn't | 第42-43页 |
| ·Subjunctive mood | 第43页 |
| ·Present Perfect | 第43-44页 |
| ·Nouns | 第44-46页 |
| ·Articles | 第46-47页 |
| ·Pronouns | 第47-48页 |
| ·Prepositions | 第48-51页 |
| ·Forms of preposions | 第48-50页 |
| ·Simplification of preposition | 第50-51页 |
| ·Adjectives and Adverbs | 第51-53页 |
| ·Other usages | 第53页 |
| ·Summary | 第53-55页 |
| Chapter 5 Analysis of the differences and their influence | 第55-65页 |
| ·Historical reasons of difference formation | 第55-59页 |
| ·Borrowings of British English | 第56-57页 |
| ·Borrowings of American English | 第57-59页 |
| ·A.E.features:fogyism | 第59-60页 |
| ·Social and political reasons | 第60-62页 |
| ·Inter-influence between A.E. and B.E. and its development | 第62-65页 |
| Chapter 6 Conclusion and Suggestions | 第65-67页 |
| ·Conclusion | 第65页 |
| ·Suggestions to language teaching and learning | 第65-67页 |
| Paper and books published during graduate study | 第67-68页 |
| Acknowledgements | 第68-69页 |
| References | 第69-71页 |
