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ated in patients with relapsed follicular lymphoma （FL） to determine the clinical and biologic responses， as well as safety of the combination［3］．
但提供论文研究的相关背景知识时， 应该用现在时（一般现在式或现在完成式）。 如：Postresuscitation myocardial dysfunction has been recognized as a leading cause of early death after initially successful cardiopulmonary resuscitation［4］．
当叙述结论或提出建议时，一般用现在时，因为文章的结论源于结果，即使是由本研究具体“结果”演绎出的一般性原则，按英语习惯，通常用现在时、臆测动词或 may， should， could 等助动词表达，如：
GM-CSF plus rituximab results in high response rates， along with a tolerable safety profile in patients with relapsed or progressive FL． The improved efficacy over rituximab monotherapy may be due to increases seen in monocyte， granulocyte，and dendritic cell populations［3］．

 

3．2引言部分的时态运用
以现在时（一般现在式或现在完成式）为主，这部分主要是回顾已发表的相关文献和介绍相关研究背景。 如：
T-IC， which are self-renewing and can differentiate into multiple lineages， are highly tumorigenic in immunodeficient mice［5］．
Radiation and conventional chemotherapy have not significantly modified its natural history， as patient response is often characterized by remission followed by consecutive relapses until death［3］．

 

3．3方法和材料部分的时态运用
主要是过去时， 因为作者在描述本研究过程中的方法和步骤。 如：
An additional GM-CSF plus rituximab treatment cycle was administered to the last six patients who did not achieve CR at the end of the first cycle［3］．
Immune cell counts （lymphocyte， monocyte，and granulocyte） were assessed from peripheral blood at baseline， before and at day 8 of each cycle， at day 30， and 3 months after treatment［3］．

 

3．4结果部分的时态运用
主要也采用过去时，因为作者主要涉及本研究所得的结果和发现，它们尚未得到医学界的认可。 如：Thirty-three patients were included in the study （Table 1）． The median age was 59 years（range， 37 to 81）， and there were 19 males and 14 females ［5］．
There was no difference between control and glibenclamide-pretreated groups in the total energy required本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。