4.1 Structural Sentence Types
Control of sentence structure is control of pace and emphasis. By structure, sentences are of four types:
| Type | Structure | Example |
|---|---|---|
| Simple | One independent clause | "The server crashed." |
| Compound | Two+ independent clauses joined by a coordinator (for, and, nor, but, or, yet, so) or semicolon | "The server crashed, and the team panicked." |
| Complex | One independent + one or more dependent clauses | "When the server crashed, the team panicked." |
| Compound-complex | Two+ independent + at least one dependent clause | "When the server crashed, the team panicked, but the lead stayed calm." |
By function, sentences are declarative (statement), interrogative (question), imperative (command — "Submit the form by Friday."), and exclamatory (strong feeling — rare in formal prose).
4.2 Active vs Passive Voice
| Voice | Pattern | Example |
|---|---|---|
| Active | Doer → verb → receiver | "The committee rejected the proposal." |
| Passive | Receiver → be + past participle (+ by doer) | "The proposal was rejected (by the committee)." |
Active voice is usually shorter, clearer, and more direct — prefer it by default. But passive voice is correct and professional when:
- The doer is unknown or irrelevant: "The files were deleted overnight."
- The receiver is the topic: "The Taj Mahal was completed in 1653."
- Tact is needed: "An error was made in the invoice" (blame softened).
- Scientific convention: "The solution was heated to 60°C."
Before (weak passive): "It was decided by the management that the event would be postponed by them." After: "Management decided to postpone the event."
Before (weak active): "Somebody stole my project files from the lab." After (better passive — thief unknown, files are the point): "My project files were stolen from the lab."
4.3 Emphasis: Position Is Power
Readers give most attention to the end of a sentence (end-focus) and second-most to the beginning. Bury trivia in the middle; place the punchline last.
Weak: "Profits fell by 40 per cent, according to the annual report released on Tuesday, unfortunately." Strong: "According to Tuesday's annual report, profits fell by 40 per cent."
Two classic sentence shapes exploit position:
| Shape | Description | Example |
|---|---|---|
| Periodic | Main clause withheld until the end; builds suspense | "After two failed prototypes, three sleepless weeks, and one budget cut, the team shipped." |
| Loose / cumulative | Main clause first, details trail after | "The team shipped, exhausted after two failed prototypes, three sleepless weeks, and a budget cut." |
Periodic sentences are dramatic; cumulative sentences are conversational. Formal writing mixes both, sparingly.
4.4 Variety and Rhythm
A paragraph of same-length sentences drones. Vary length and openings deliberately: a short sentence after three long ones lands like a verdict.
Monotonous: "The library is a good place to study. The library is quiet in the morning. The library has fast internet. The library closes early on Sundays." Rewritten: "The library is the best place on campus to study. Mornings are quiet, the internet is fast, and a seat is always free. There is one flaw. On Sundays, it closes early."
4.5 Common Construction Errors
| Error | Faulty | Fixed |
|---|---|---|
| Fragment | "Because the deadline was extended." | "Because the deadline was extended, we added tests." |
| Comma splice | "The demo failed, we rescheduled it." | "The demo failed, so we rescheduled it." / "The demo failed; we rescheduled it." |
| Run-on (fused) | "He submitted the report she reviewed it." | "He submitted the report, and she reviewed it." |
| Dangling modifier | "Walking into the lab, the servers were humming." | "Walking into the lab, I heard the servers humming." |
| Misplaced modifier | "She almost debugged every module." | "She debugged almost every module." |
| Faulty parallelism | "He likes coding, to read, and football." | "He likes coding, reading, and football." |
| Mixed construction | "By practising daily is how you improve." | "Practising daily is how you improve." |
| Squinting modifier | "Students who revise often score well." | "Students who often revise score well." |
Why danglers happen: an opening modifier grabs the nearest following noun as its subject. "Walking into the lab, the servers..." literally claims the servers were walking. Always ask: who performs the opening action? Put that noun immediately after the comma.
🎯 Exam Focus
- Define the four structural sentence types with one example of each.
- Convert to active voice: "It has been observed by the faculty that assignments are being submitted late by students." When would you keep a passive?
- List four situations in which passive voice is preferable to active.
- Correct and name the error: (a) "Having finished the essay, the laptop was shut down." (b) "The results were poor, the students demanded a review."
- Distinguish a periodic sentence from a cumulative sentence, with examples.
- Rewrite for variety and emphasis: "The canteen food is bad. The canteen is crowded. The canteen staff are slow. The canteen is still popular."