5 exercises — keep tenses consistent and choose between past simple, past perfect, and present perfect when writing incident timelines and postmortems.
0 / 16 completed
1 / 16
A postmortem timeline describes an event that had already happened before the outage was noticed. Which sentence uses the correct tense sequence?
Past perfect for the earlier of two past events: When one past event precedes another, the earlier one takes the past perfect (had filled up) and the later one the past simple (noticed). Option A uses past simple for both, losing the sequence. Option C wrongly uses present perfect have noticed for a finished past action. Option D mixes present perfect has filled into a past narrative. Postmortems rely on this contrast to make timelines unambiguous.
2 / 16
A timeline narrates a sequence of completed actions during the incident. Which sentence keeps tenses consistent?
Consistent past simple for a completed narrative: An incident timeline recounts finished events, so all three verbs should stay in the past simple: crashed, restarted, repeated. Options A and B switch between present and past mid-sentence, which is jarring and unclear. Option D introduces present perfect and present simple, breaking the narrative thread. Tense consistency is one of the most common things reviewers flag in postmortem drafts.
3 / 16
A postmortem states a general fact about the system that is still true today. Which tense is appropriate?
Present simple for enduring facts: Even within a past-tense narrative, statements that remain permanently true use the present simple: The cache layer uses an LRU policy. The other options place this still-current fact in the past, wrongly implying the policy no longer applies. A useful rule for postmortems: narrate events in the past, but describe how the system still works in the present.
4 / 16
A postmortem reports what monitoring showed at a specific past moment. Which sentence is correct?
Past simple for events at a stated past time: With a specific past timestamp (at 14:02), both verbs take the past simple: spiked and stayed. Options A and B switch tense within the sentence. Option D overuses the past perfect — had spiked is only needed when signalling that an event came before another past event, which is not the case here since this is the main timeline event itself.
5 / 16
In the "remediation" section, you describe an action already completed whose effect is still relevant now. Which tense fits best?
Present perfect for completed actions with present relevance: Remediation items are finished actions whose results matter now, so the present perfect is ideal: We have added an eviction policy. Option A (present simple) reads like a routine habit, not a completed fix. Option C (past perfect) wrongly implies the action preceded some other past event. Option D (past continuous) describes an interrupted ongoing action rather than a completed remediation.
6 / 16
Reviewer: 'The API returned a 500 error. We'll investigate.' – This Slack message is best revised to reflect the ongoing investigation. Which option demonstrates correct tense consistency?
The original sentence describes an action in progress – the investigation is ongoing. Using 'are investigating' accurately reflects this continuous action. Options B and D are incorrect because they shift the timeframe to a completed past action (investigated) or a habitual present without connecting it to the current situation.
7 / 16
Reviewer: 'The API returned a 500 error. We'll investigate.' – This Slack message is best revised to reflect the ongoing investigation. Which option demonstrates correct tense consistency?
The original sentence describes an action in progress – the investigation is ongoing. Using 'are investigating' accurately reflects this continuous action. Options B and D are incorrect because they shift the timeframe to a completed past action (investigated) or a habitual present without connecting it to the current situation.
8 / 16
In a Slack channel discussing the performance issues with the new microservice, David posted: 'The service was responding slowly. We're monitoring its metrics closely.' Which revision best maintains tense consistency and conveys the ongoing investigation effectively?
Option 2 uses the present perfect continuous ('has been responding') which accurately describes an action that started in the past and continues up until now – ideal for ongoing monitoring. Option 1 is simple past, implying a completed action without the ongoing aspect. Options 3 and 4 introduce unnecessary hypothetical future scenarios.
9 / 16
During a postmortem for the recent database outage, Sarah wrote: 'The system experienced high latency. We are currently analyzing the logs to determine the root cause.' Which revision best maintains tense consistency and accurately reflects the ongoing investigation?
The original sentence uses 'are analyzing' to describe an ongoing action. Option 1 correctly maintains this continuous tense. Options 2 and 3 incorrectly shift to past tenses, disrupting the timeline of events. Option 4 suggests a future action, which isn't appropriate for describing what's currently happening during the investigation.
10 / 16
A Slack message from Alex reads: 'The service was down. We deployed a fix.' Which of the following revisions best addresses the tense inconsistency and provides more context?
The original sentence implies the deployment happened *while* the service was still down—a confusing statement. 'We have deployed' clearly indicates the action is complete and its effect (the service being fixed) is now in progress. Options 1 and 2 incorrectly use past tenses, while option 4 adds unnecessary complexity.
11 / 16
In a PR description for a new feature, Mark writes: 'This change improves performance by reducing query latency.' Which tense is most appropriate for this statement, reflecting a lasting impact?
Using 'has improved' indicates that the positive effect of the change is now a permanent state. The present perfect has tense consistency with describing an impact that continues to be true. Options 1 and 3 suggest future or past actions respectively, while option 4 implies ongoing improvement.
12 / 16
During a postmortem discussion about the recent deployment of the new payment service, Emily stated: 'The system started experiencing intermittent errors. We are tracking these issues closely and investigating potential root causes.' Which revision best maintains tense consistency and provides more detailed information?
The original sentence uses 'are' which is appropriate for an ongoing investigation. Option A incorrectly shifts to the past tense ('had started') creating a confusing timeline. Option B uses 'has,' implying this is still happening now, which isn't necessarily accurate in a postmortem. While option C is grammatically correct, it lacks the active voice and detail needed for a clear update. Option D expands on the sentence but retains the correct tense sequence for describing an action ongoing at the time of writing.
13 / 16
In a Slack channel discussing a slow API response, Liam wrote: 'The server was responding slowly. We've implemented caching to improve performance.' Which revision best maintains tense consistency and provides more context?
Liam's original statement describes a past state ('was responding'). To accurately represent the action of implementing caching, 'responded' is more appropriate. Option A incorrectly shifts to the past, confusing the timeline. Option B uses 'is,' implying an ongoing situation which isn't necessarily true in a postmortem context. Option D adds unnecessary detail and maintains incorrect tense usage.
14 / 16
During a standup update, Ben reported: 'We resolved the database connection issue yesterday.' Which sentence best describes this situation using appropriate tense consistency?
Ben's original statement uses 'resolved,' which indicates a completed action. The past perfect ('have resolved') correctly emphasizes that this resolution occurred in the past and is now finished. Options A & B are present continuous/present perfect, suggesting ongoing work or an unrealized future respectively. Option D incorrectly suggests continued action at the time of reporting.
15 / 16
PR Description: 'The fix reduces latency by optimizing the database query.' Which revision best maintains tense consistency and provides a more precise reflection of the impact?
Using 'has' (present perfect) correctly indicates an effect that continues to be true as a result of the fix. This is the most accurate way to describe the lasting impact of the change. Option A uses the simple past, implying the reduction happened and then stopped. Option B introduces uncertainty about the future. Option D is overly verbose and doesn't clearly state the causal relationship.
16 / 16
Slack Message: 'The server was unresponsive.' Which of the following options best maintains tense consistency when describing the subsequent actions taken?
Using 'have' (present perfect) after a statement of an ongoing problem clearly connects the initial state with the action taken to resolve it. This is crucial for accurate timeline documentation. Option B introduces unnecessary complexity and shifts the focus to a past event. Options C and D use the present continuous or future tense inappropriately, failing to link the two actions.
What will I practise in "Tense Consistency in Postmortems & Timelines — Grammar Exercises"?
Practise past simple, past perfect, present perfect, and tense consistency in postmortems and incident timelines.
How many exercises are in this module?
This module has 16 multiple-choice exercises, each with instant feedback and a full explanation of the correct answer.
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