A student is writing a research paper on the effects of climate change and wants to ensure that all verb tenses are consistent within a paragraph describing a historical trend. The original paragraph reads: 'In the past decade, ocean temperatures rose significantly. Scientists predict that this trend will continue, and many marine species already suffered from habitat loss.' Which revision corrects the verb tense inconsistency?
- AIn the past decade, ocean temperatures have risen significantly. Scientists predict that this trend will continue, and many marine species have already suffered from habitat loss.
- BIn the past decade, ocean temperatures rose significantly. Scientists predicted that this trend would continue, and many marine species already suffered from habitat loss.
- CIn the past decade, ocean temperatures rise significantly. Scientists predict that this trend will continue, and many marine species already suffered from habitat loss.
- DIn the past decade, ocean temperatures rose significantly. Scientists predict that this trend continues, and many marine species already suffered from habitat loss.
Show answer & explanationAnswer & explanation
Correct answer: A. In the past decade, ocean temperatures have risen significantly. Scientists predict that this trend will continue, and many marine species have already suffered from habitat loss.
The original sentence mixes simple past ('rose,' 'suffered') with future ('will continue') and present simple ('predicts'). Option B correctly uses the present perfect ('have risen,' 'have suffered') for actions that began in the past and continue or have present relevance, maintaining consistency with the present 'predict' and future 'will continue' for ongoing and future trends.
Why the other options are wrong
- B. This option shifts everything to past tense ('predicted,' 'would continue'), which changes the meaning of the scientists' current prediction.
- C. This option uses the simple present 'rise' for a past decade, which is incorrect, and retains 'suffered' which is inconsistent with the ongoing nature.
- D. This option creates a new inconsistency with 'continues' and retains 'suffered,' which doesn't align with the ongoing prediction.
Verb Tense Consistency
Maintaining the same grammatical tense for verbs within a sentence or paragraph when describing actions that occur at the same time or within a continuous timeframe.
- Avoids confusing the reader about when events happened.
- Changes in tense should be logical and intentional.
- Common errors involve mixing past, present, and future tenses inappropriately.
Memory trick: Keep the Clock Consistent, or Chaos Comes.