Complex Sentence Structures
The art of combining and compressing clauses — participle phrases, absolutes, reduced relatives, and advanced subordination that make writing dense, elegant, and cohesive.
From strings of clauses to crafted sentences
At C2, sophistication isn't longer sentences — it's tighter ones. You learn to compress full clauses into participle phrases and reduced relatives, to layer ideas with precise subordinators, and to bind sentences together so writing flows.
Three clauses, compressed into one fluent sentence: Basic: She had finished her work. She felt relieved. She went home. C2: Having finished her work, she went home, relieved.
Where you'll meet them: literary prose, journalism, academic writing, and CPE. The reward is economy — saying more with fewer words, gracefully.
The core complex structures
Five tools for combining and reducing clauses. Participle clauses (type 1) are the workhorse of advanced writing.
Participle clauses
Use it to: compress a clause that shares the main subject. -ing = active and often simultaneous; -ed = passive; having + p.p. = a completed earlier action. The participle's hidden subject must match the main clause's subject.
Absolute constructions
Use it to: add background or attendant circumstances with its own subject — unlike a participle clause, the noun differs from the main subject. Common fixed forms: weather permitting, that said, all things considered, this done.
Reduced relative clauses
Use it to: trim a relative clause. Drop the relative pronoun and be: an active idea leaves an -ing participle; a passive one leaves an -ed participle. This is one of the quickest ways to make prose more concise.
Advanced subordinators & concession
Use it to: express concession and condition with precision. However/Whatever/Whoever + clause = "no matter how/what/who". Much as = although greatly; given that = since; albeit = though (+ phrase); lest = for fear that (+ base form).
Nominalization & cohesion
Use it to: pack information densely and link sentences. Nominalization (verb → noun) creates the abstract, formal texture of academic writing and lets a previous idea become the subject of the next sentence — a key cohesion device.
Common C2 pitfalls
The signature error here is the dangling participle — a reduced clause whose hidden subject doesn't match the main one.
Practice & score yourself
Ten questions in three formats. You get instant scoring and a full explanation for every answer — especially when you get one wrong.
Part A — Choose the correct structure
Teaching techniques for this point
Approaches that build a feel for compression and flow, not just rule-following, at C1–C2.
Sentence-combining workshop
Give three short choppy sentences and challenge students to fuse them into one elegant sentence using a participle or reduced relative. Comparing different students' solutions shows there's craft, not one answer, in good syntax.
Dangling-modifier hunt
Project comic dangling participles ("Running for the bus, my hat blew off"). Students spot the absurd hidden subject and repair it. The humor makes the subject-matching rule unforgettable.
Reduce-the-relative race
Hand out sentences full of "who is / which are" clauses. Teams race to delete the pronoun + be and leave a clean participle. Fast, visible wins build the conciseness instinct.
Register thermometer
Take one idea and have students climb from plain to formal using nominalization ("They decided…" → "Their decision…" → "The decision-making process…"). Seeing the cline demystifies academic density.
Connector card deck
Students draw cards (much as, given that, albeit, lest, however) and must build a sentence that fits each. Forced, varied practice moves these subordinators from passive recognition into active use.
Cohesion repair
Give a paragraph of disconnected sentences and have students stitch it together with participle openers and summarizing 'which'. Working at paragraph level shows these structures are tools for flow, not isolated forms.
The one rule to remember
Compression is power — but every reduced clause needs an owner. Before you front a participle, check that its hidden subject is the same as the main clause's subject. Match it, and your sentences turn dense and elegant; miss it, and they dangle.