Modifiers and parallel structures
Attach a modifier to the intended noun and keep coordinated grammatical forms comparable.
What you will tackle
- Place introductory and embedded modifiers beside their intended referents
- Correct dangling and ambiguous modifiers
- Maintain parallel structure in ACT usage and sentence formation
Ask who performs the introductory action
In ‘Having inspected the cable, the technician identified a fault’, the technician performs the inspection. ‘Having inspected the cable, a fault was identified’ incorrectly makes the fault the following subject. Move a modifier so it clearly describes the intended word.
Coordinate equivalent grammatical roles
A list such as ‘to inspect, to repair and to record’ uses parallel infinitives. The repeated to can be omitted if the grammatical relationship remains clear. Comparisons should match the same kinds of thing: compare one city's climate with another city's climate, not with the city itself.
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 ‘Walking through the archive, a rare map caught Mina's attention.’ Explain the mismatch.
Show a starting hint
Find the intended performer of the opening action.
Compare with the explained answer
- The introductory walking phrase should describe the person walking.
- The following subject a rare map cannot perform that action.
- Make Mina the main subject.
Answer / response criteria: ‘Walking through the archive, Mina noticed a rare map.’
Independent practice
Independent 1
Revise ‘The role involves checking records, to interview staff and writing reports.’ Then correct ‘The population of Baytown exceeds Hillford.’
Compare with the explained answer
- Use parallel gerunds: checking, interviewing, writing.
- The comparison must be population to population.
- Write ‘The population of Baytown exceeds that of Hillford.’
Answer / response criteria: ‘The role involves checking records, interviewing staff and writing reports.’ ‘The population of Baytown exceeds that of Hillford.’
Application practice
Application 1
A report says ‘Only the assistant recorded three readings.’ The writer means that the assistant recorded exactly three, rather than more than three, readings. Rewrite it and explain how modifier placement changes the focus.
Compare with the explained answer
- Only before the assistant restricts who recorded readings.
- Move the restriction to the quantity.
- ‘The assistant recorded only three readings’ restricts the number.
Answer / response criteria: ‘The assistant recorded only three readings.’ The revision focuses only on the count.
What can you explain now?
A report says ‘Only the assistant recorded three readings.’ The writer means that the assistant recorded exactly three, rather than more than three, readings. Rewrite it and explain how modifier placement changes the focus.
Compare with the explanation
‘The assistant recorded only three readings.’ The revision focuses only on the count.
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