Table of contents Acknowledgement Table of contents List of tables, charts and figures Chapter One: Introduction 1.1. Reasons for choosing the topic 1.2. Objectives of the study 1.3. Scope of the study 1.4. Significance of the study 1.5. Methods of the study 1.6. Organization of the study Chapter Two: Literature review 2.1. Factors affecting language learning 2.2. Errors analysis 2.3. The notion of errors in language learning 2.4. Errors vs. mistakes 2.5. Causes of errors in language learning 2.5.1. First language interference 2.5.2. Causes independent from first language 2.6. The concept of cohesion 2.7. Cohesive devices in writing 2.8. Types of cohesion 2.8.1. Grammatical cohesion 2.8.2. Lexical cohesion 2.9. Summary Chapter Three: Research Methodology 3.1. Subjects 3.2. Instruments of data collection 3.3. Method of data analysis 3.4. Summary Chapter Four: Presentation and Analysis of Data 4.1. Errors in the use of reference 4.1.1. Errors in the use of demonstrative reference 4.1.2. Errors in the use of personal reference 4.1.3. Errors in thes use of comparative reference 4.2. Errors in the use of conjunction 4.2.1. Errors in the use of adversative conjunction 4.2.2. Errors in the use of causal conjunction 4.2.3. Errors in the use of additive conjunction 4.3. Errors in the use of lexical cohesion 4.4. Summary Chapter Five: Implications Chapter Six: Conclusion Bibliography Appendices