SCI论文写作时态的运用容易掌握。其原则是：
(1)描述作者自己的工作时通常使用过去时，如在Material and Methods和Results部分。但是用现在时态叙述作者结论。
(2)描述他人的工作时通常使用现在时或现在完成时，在Introduction中的文献回顾和 Discussion中的大部分(注：在Discussion中，用过去时描述他人的工作不能算错)。
语言表达技巧
如何指出当前研究的不足并有目的地引导出自己研究的重要性？
在叙述前人成果之后，用However来引导不足，<strong style="font-size: 12px;">SCI论文写作提出一种新方法或新方向。如：However, little information(little attention/little work/little data/little research)(or few studies/few investigations/few researchers/few attempts)(or no/none of these studies)has(have)been done on(focused on/attempted to/conducted/investigated/studied(with respect to))。如：Previous research (studies, records) has (have) failed to consider/ ignored/ misinterpreted/ neglected to/overestimated, underestimated/misleaded. thus, these previus results are inconclisive, misleading, unsatisfactory, questionable, controversial. Uncertainties (discrepancies) still exist
