相信最近很多美国留学生正在忙着写留学作业，那么什么样的句子能够让文章有结构性并且又能提高自己的写作水平呢?今天BayDue论文网就和大家分高分句式短语合集，建议收藏哦! 1、Establishing why your topic (X) is important 以下这些句子是当你想要在文章中表述为什么你的研究是有意义的、较为重要的、能弥补什么样的gap的时候会用到。 里面的词都可以替换着用，这样哪怕句式多次出现，词汇也不会显得贫乏。 1. X is the main/leading/primary/major cause of … 2. Xs are a common/useful/critical part of… 3. Xs are among the most widely used / commonly discussed / well-known / well-documented / widespread / commonly investigated types of … 4. X is recognized as being/believed to be / widely considered to be the most important … 5. It is well known / generally accepted / common knowledge that X is … 6. X is increasingly becoming/set to become a vital factor in … 7. Xs are undergoing a revolution / generating considerable interest in terms of … 8. Xs are attracting considerable/increasing/widespread interest due to … 9. X has many uses/roles/applications in the field of … 10. A striking/useful/remarkable feature of … 11. The main / principal / fundamental characteristics of X are:X accounts / is responsible for 2、Outlining the past-present history of the study of X (no direct references to the literature) Introduction部分如果你想阐述你研究的方向的background，这些background又不是引用文献里面的，而是总结出来的常识，你就可以用这些句式。 1. Last century X was considered to be/viewed as / seen as the most … 2. Initial / Preliminary / The first studies of X considered it to be 3. Traditionally X / In the history of X, the focus has always been … 4. Scientists / Researchers / Experts have always seen X as … 5. Until now / For many years / Since 1993 Xs have been considered as … 6. X has received much attention in the last two years / in the past decade / over the last two decades … 7. For the past five years / Since 2011 there has been a rapid rise in the use of Xs 8. The last two years have witnessed/seen a huge growth in X … 9. The past decade / last year has seen a renewed importance in X … 10. Recent developments in / findings regarding X have led to … 11. X has become a central / an important/critical issue in … 3、Outlining the possible future of X 如果你想展望研究方向的未来发展前景可以用以下句子。有下个decade怎么说的句式，也有到2025年该怎么说的句式。 1. The next decade is likely to see/witness a considerable rise in X 2. In the next few years, X will become/is likely to have become 3. Within the next few years, X is set/destined / likely to become an important component in … 4. By 2025 / Within the next ten years, X will have become … 5. X will soon / shortly / rapidly / inevitably be an issue that … 4、Indicating the gap in knowledge and possible limitations 表示当前学术界对某领域研究不足、对某方面研究还缺乏深度，适合用在literature review中解释前人文献有哪些没有包括，或者introduction里面解释目前学术上有什么GAP。 1. Few researchers have addressed the problem/issue/question of … 2. Previous work has only focused on / been limited to / failed to address … 3. A basic / common / fundamental / crucial / major issue of … 4. The central / core problem of 5. A challenging / An intriguing / An important / A neglected area in the field of … 6. Current solutions to X are inconsistent / inadequate / incorrect / ineffective / inefficient / oversimplistic / unsatisfactory 7. Many hypotheses regarding X appear to be ill-defined / unfounded / not well-grounded / unsupported / questionable / disputable / debatable 8. The characteristics of X are not well understood/are misunderstood/have not been dealt with in depth. 9. It is not yet known/has not yet been established whether X can do Y. 10. X is still poorly / not widely understood. 11. X is often impractical / not feasible / costly … 12. Techniques to solve X are computationally demanding / subject to high overheads/time-consuming/impractical / frequently unfeasible. 13. A major defect / difficulty / drawback / disadvantage / flaw of X is … 14. One of the main issues in our knowledge of / what we know about X is a lack of … 15. This particular/specific area of X has been overlooked/has been neglected/remains unclear … 16. Despite this interest, no one to the best of our knowledge / as far as we know has studied … 17. Although this approach is interesting, it suffers from / fails to take into account / does not allow for 18. In spite of / Despite its shortcomings, this method has been widely applied to … 19. However, there is still a need for / has been little discussion on … 20. Moreover, other solutions/research programs/approaches have failed to provide … 21. Most studies have only focused/tended to focus on … 22. To date / Until now this methodology has only been applied to … 23. There is still some / much/considerable controversy surrounding … 24. There has been some disagreement concerning/regarding/with regard to whether 25. There is little / no general agreement on … 26. The community has raised some issues/concerns about it… 27. Concerns have arisen/been raised which question/call into question the validity of … 28. In the light of recent events in x, there is now some / much/considerable concern about … 以上就是一些在代写美国作业中比较好用的高分短语句式大全，觉得有用的小伙伴们赶紧收藏吧!欢迎有需要美国作业代写的可以选择BayDue哦，我们将为大家提供原创保证，分数保障的代写服务，确保为大家取得满意的分数。