文献综述在essay里起到非常关键的作用，写好literature review能让我们事半功倍！整理了一些经常用到的例句，大家也可以参考哦～
对相关文献的一般性评论
1️⃣The literature on X has highlighted several …
2️⃣Different theories exist in the literature regarding …
3️⃣More recent attention has focused on the provision of …
4️⃣There are relatively few historical studies in the area of …
5️⃣A large and growing body of literature has investigated …
6️⃣Much of the literature since the mid-1990s emphasises the …
7️⃣Much of the current literature on X pays particular attention to …
8️⃣There is a large volume of published studies describing the role of …
9️⃣The existing literature on X is extensive and focuses particularly on …
以前的研究：一个历史的视角
1️⃣Around the early 1960s, small-scale research and case studies began to emerge linking …
2️⃣It was not until the late 1960s that historians considered X worthy of scholarly attention.Research into X has a long history.
3️⃣For many years, this phenomenon was surprisingly neglected by …
4️⃣Only in the past ten years have studies
of X directly addressed how …
5️⃣Prior to the work of Smith (1983), the role of X was largely unknown.
6️⃣Over the past decade, most research in X has emphasized the use of …
7️⃣In recent years, there has been an increasing amount of literature on …
8️⃣Early examples of research into X include … (Smith, 1962; Jones, 1974).
9️⃣During the past 30 years, much more information has become available on …
以前的研究：所采取的方法学方法
1️⃣Most research on X has been carried out in …
2️⃣Most researchers investigating X have utilised…
3️⃣Using this approach, researchers have been able to …
4️⃣Several systematic reviews of X have been undertaken.
5️⃣The vast majority of studies on X have been quantitative.
6️⃣What we know about X is largely based on observational studies.
7️⃣There are a number of large cross-sectional studies which suggest …
以前的研究：调查的领域
1️⃣To date, several studies have investigated …
2️⃣A number of studies have begun to examine …
3️⃣Various studies have assessed the efficacy of …
4️⃣Researchers attempted to evaluate the impact of …
5️⃣A great deal of previous research into X has focused on …
6️⃣Several studies have used longitudinal data to examine …
7️⃣Previous studies have explored the relationships between X and Y.
8️⃣Twenty cohort study analyses have examined the relationship between …
9️⃣A number of authors have considered the effects of … (Smith, 2003; Jones, 2004).
以前的研究：已经确定或提出的内容
1️⃣Several lines of evidence suggest that …
2️⃣Previous research has established that …
3️⃣Previous research has established that …
4️⃣Data from several studies suggest that …
5️⃣It is now well established from a variety of studies that …5.A number of studies have postulated a convergence between …
说明目前对该主题的了解情况
1️⃣There is an unambiguous relationship between X and Y (Rao, 1998).
2️⃣X is significantly reduced during the first months of … (Smith, 2000; Jones, 2006).
3️⃣X, Y and Z appear to be closely linked (Smith, 2008).
4️⃣X appears to be positively related to both Y and Z (Smith, 2007)
5️⃣X is a principal determining factor of Y (Smith, 2005; Jones, 2013).
综合材料：将资源整合起来
1️⃣Similarly, Nicoladis (2006) found that X …
2️⃣In the same vein, Smith (1994) in his book XYZ notes …
3️⃣This view is supported by Jones (2000) who writes that …
4️⃣Smith argues that her data support O’Brien’s (1988) view that …
5️⃣Al-Masry’s (1986) work on X is complemented by Smith’s (2009) study of …
6️⃣Almost every paper that has been written on X includes a section relating to …
提到以前的调查：突出的调查
1️⃣One longitudinal study found that …
2️⃣A seminal study in this area is the work of
3️⃣A small scale study by Smith (2012) reached different conclusions, finding no increasein …
4️⃣The study by Jones (1990) offers probably the most comprehensive empirical analysisof …
5️⃣In an analysis of X, Smith et al. (2012) found …
6️⃣In a follow-up study, Smith et al. (2009) found that …
7️⃣In an investigation into X, Smith et al. (2012) found …
8️⃣In a study investigating X, Smith (2004) reported that …
9️⃣In a comprehensive study of X, Jones (2001) found that …
对审查或审查的部分内容进行总结
1️⃣Two important themes emerge from the studies discussed so far:
2️⃣However, such studies remain narrow in focus dealing only with…
3️⃣These studies clearly indicate that there is a relationship between …
4️⃣In view of all that has been mentioned so far, one may suppose that …
5️⃣There remain several aspects of X about which relatively little is known.