Generally speaking, in an abstract, the opening and concluding statements are written in the present tense or the present perfect tense, while the methods and results are expressed in the past tense.
举一反三
- When you point out the purpose / problem of research again, the is mainly used. A: present tense B: present perfect tense C: past tense D: future tense
- If the research material is conventional and not a specific material reported in the paper, we use ( ). A: the present perfect tense B: the future tense C: the simple present tense D: the simple past tense
- 中国大学MOOC: Three kinds of verb tenses are frequently used in English news headlines: present tense, future tense and present perfect tense.
- 中国大学MOOC: For something that has occurred in the recent past, BrE tends to use the simple tense while AmE shows the preference for the present perfect tense.
- While writing suggestions for future studies, you are advised to use _________. A: the future tense B: the past tense C: the present tense D: the progressive tense