Verb forms, auxiliaries and consistent voice
Choose the form demanded by an auxiliary and keep tense, voice and point of view coherent.
What you will tackle
- Distinguish irregular past forms from participles
- Use auxiliaries with appropriate verb forms
- Revise unnecessary voice or person shifts
- Preserve deliberate shifts justified by meaning
An auxiliary determines the next form
Some irregular verbs have different past and past-participle forms: saw/seen, went/gone and wrote/written. Perfect constructions use have plus a past participle; progressive constructions use be plus an -ing form; the standard passive examples here use be plus a past participle. A modal such as can or should takes the base form. The auxiliary construction is ‘could have gone’, never ‘could of gone’. A form can be grammatically correct while giving the wrong time or meaning.
Keep the perspective coherent
In these action sentences, active voice presents the doer as subject; a passive clause makes the recipient the subject. Choose according to the intended focus, and revise an unnecessary shift that obscures who acts. A paragraph addressing ‘you’ should not drift accidentally to ‘one’ or ‘we’. A change of tense, voice or person is justified when the change of time or perspective is deliberate and clear.
Build your notes, then practise
Work on paper before opening an explanation. Guided tasks provide a starting point; independent tasks remove the scaffolding; application tasks ask you to justify a method or interpretation in context.
Guided practice
Guided 1
Correct and explain: ‘The team has wrote the report.’ ‘Yesterday, Maya seen the result.’ ‘The instrument can measures pressure.’
Show a starting hint
Find the auxiliary before choosing a verb form.
Compare with the explained answer
- Has requires the past participle written: ‘has written’.
- The simple past without an auxiliary is saw: ‘Maya saw the result’.
- A modal takes the base form: ‘can measure pressure’.
Answer / response criteria: has written; saw; can measure.
Independent practice
Independent 1
Correct ‘By noon, the doors had went shut’ while preserving the meaning that they were closed. Revise ‘You must label each sample so one can identify it later’ into consistent person. Rewrite ‘The team measured the sample, and the results were recorded by the team’ in consistent active voice.
Compare with the explained answer
- Use a natural participle construction: ‘By noon, the doors had been closed.’
- Keep second person: ‘You must label each sample so you can identify it later.’
- Use parallel active clauses: ‘The team measured the sample and recorded the results.’
Answer / response criteria: Revisions as stated; alternatives preserving time and meaning are acceptable.
Application practice
Application 1
A methods paragraph says, ‘We heated the solution. The temperature was recorded automatically every second. You then compare the readings.’ Revise the final sentence to keep the writer's perspective, and explain whether the passive second sentence must change.
Compare with the explained answer
- ‘We then compared the readings’ maintains first person and the past sequence.
- The passive sentence may appropriately focus on the temperature and automatic recording.
- Consistency does not require eliminating every passive; it requires clear actors, time and perspective where they matter.
Answer / response criteria: Use ‘We then compared the readings’; the purposeful passive can remain.
What can you explain now?
A methods paragraph says, ‘We heated the solution. The temperature was recorded automatically every second. You then compare the readings.’ Revise the final sentence to keep the writer's perspective, and explain whether the passive second sentence must change.
Compare with the explanation
Use ‘We then compared the readings’; the purposeful passive can remain.
Explain the reasoning before comparing. This review records your self-assessment rather than an official score or mastery decision.
After trying it yourself, choose your next review. This is your self-assessment.
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Source and review status
Coverage follows the named requirements and examples in the 2026–2027 ACT test guide and subject descriptions. That guide explicitly does not list every possible topic. The broader coded College and Career Readiness Standards are also mapped to conceptual teaching and practice; this does not calibrate a learner to a score band. The separate scientific-background context list and reading-complexity rubric have their own stated limits.
Original teaching and explained self-check practice are available. Specialist review and difficulty calibration remain pending. Essays require self-check or teacher review and are not automatically marked or awarded official scores.
Official source specification / guide