Which sentence uses ellipsis in a way that creates problematic ambiguity?
AShe can swim, and her brother can too.
BSarah ordered salmon; Marcus, the steak.
CHe told her to leave and she did.
DI like jazz and she does too.
In option C, 'she did' requires recovery of the omitted predicate — but two recoveries are equally plausible: 'she left' (she complied) or 'she told him to leave' (she returned the instruction). Neither the syntax nor the preceding context clearly favors one reading over the other, so the ellipsis introduces genuine ambiguity. Options A, B, and D all have clear, unambiguous recoveries: the parallel structure makes it obvious what is omitted. The test for valid ellipsis is whether readers can confidently recover the missing words with a single interpretation.
Question 2 Multiple Choice
What structural property must hold for ellipsis to work without creating ambiguity?
AThe sentence must use a coordinating conjunction like 'and' or 'but'
BThe omitted element must be recoverable from context — the parallel structure must make one and only one recovery clearly correct
CThe subject of the elliptical clause must be identical to the subject of the full clause
DThe omitted verb must be in the same tense as the expressed verb
Parallelism — structural predictability from the surrounding context — is the necessary condition for ellipsis. The key is not the specific grammatical form but whether the omitted material can be uniquely recovered. In 'Maria can swim, and so can Jorge,' the parallel auxiliary structure licenses a single recovery: *swim*. In gapping ('Sarah ordered salmon; Marcus, the steak'), the parallel subject–object structure licenses recovery of *ordered*. Where multiple recoveries are plausible, the omission creates ambiguity regardless of whether a conjunction is present or whether subjects match.
Question 3 True / False
'She likes jazz and he does too' successfully omits the verb phrase 'likes jazz' through verb phrase ellipsis, licensed by the auxiliary 'does' signaling that the same kind of predicate applies.
TTrue
FFalse
Answer: True
This is a standard example of verb phrase ellipsis in English. The auxiliary 'does' signals that a full verb phrase follows — but instead of repeating 'likes jazz,' the writer omits it and relies on the reader to recover it from the parallel structure of the first clause. This works unambiguously because: (1) the auxiliary matches (present-tense 'does' = 'likes'), (2) only one predicate is available for recovery ('likes jazz'), and (3) the parallel structure of two clauses with the same predicate makes the omission structurally predictable.
Question 4 True / False
Ellipsis is generally preferable to repetition — whenever a word or phrase is recoverable from context, it should be omitted to keep prose concise.
TTrue
FFalse
Answer: False
This overcorrects. Ellipsis is a *stylistic choice* that trades brevity for reader effort: the reader must mentally supply the missing words. When the parallel structure is complex, the omitted material spans many words, or the subject matter is technical, repetition can be clearer than omission — the small gain in concision is outweighed by the cognitive cost of reconstruction. The Common Misconceptions section flags exactly this: not recognizing that ellipsis is optional, not mandatory. Good writers make the tradeoff deliberately, choosing ellipsis when brevity and flow matter and choosing repetition when clarity and ease of processing matter.
Question 5 Short Answer
What is the test for whether a given ellipsis is valid, and what does a failed test reveal about the underlying sentence structure?
Think about your answer, then reveal below.
Model answer: The test is: can a reader supply the missing words with confidence, or are multiple recoveries plausible? If only one recovery is possible — meaning the surrounding structure uniquely determines the omitted material — the ellipsis is valid. If two or more different completions are equally grammatical and contextually plausible, the ellipsis is invalid and creates ambiguity. A failed test often reveals that the underlying parallelism was weaker than the writer assumed: the two clauses were not as structurally matched as they appeared. This makes ellipsis a kind of diagnostic tool — if you cannot omit a repeated element clearly, the parallel structure itself may need revision.
The deeper insight is that ellipsis doesn't just test the omission — it tests the entire surrounding sentence architecture. When ellipsis creates ambiguity, it is usually because the writer constructed two clauses that seemed parallel but diverged in their predicate structure. Forcing yourself to check ellipsis validity (can the reader recover this uniquely?) is a useful revision step that can reveal structural problems invisible when all the words are present.