根据自己的选题，确定研究对象，首先，一定要介绍清楚你的研究对象来源于哪些地区;其次，这些研究对象你是如何选取的， 详细内容请看下文本科毕业论文开题报告。

The choice of this subject/topic is firstly to define English idioms and analyze the features of them. It then explores the cohesive function after careful analysis and discussion, to arouse the concern of using idioms appropriately and help readers make full use of the cohesive function for communicating more concisely and idiomatically, thus more effectively.

English idioms are an important part of the English vocabulary. The general tendencies of present-day English are towards more idiomatic usages. Halliday and Hason (1976) pointed out that there are three functions of English idioms (ideational function, interpersonal function and textual function). Another scholar, Fernando C. (1996), also made valuable contributions to the understanding of idiomatic expression of coherent text. Chinese linguists like Hu Zhuanglin (1994, 1996), Zhu Yongsheng (1995, 1996, 1997) and Zhang Delu (1994) mainly made contributions to the study of textual cohesion.

As English idioms are much alive in everyday English, a close look at the function of idioms must be taken. This dissertation includes the following five aspects:

1. Introduction

2. A General Study of English Idioms

2.1 The Definition of English Idioms

2.2 Features of English Idioms