How SSC Tests One-Word Substitution: Pattern, Scoring and Method
This chapter explains what one-word substitution is worth in the English sections of SSC CGL 2026 and CHSL 2026, how negative marking changes the value of a guess, how much time each question gets, and how to read a stem before looking at the options. It contains no word list. The eight entry chapters that follow apply the stem-reading and root methods taught here.
KarmSakha preparation topics covered
- Where one-word substitution is named in the CGL 2026 and CHSL 2026 English syllabi
- The English section in each tier: questions, marks, time and negative marking
- Marking arithmetic for right, wrong and skipped answers
- Expected value of a blind guess under Tier-I and Tier-II marking (derived)
- Sectional timers and seconds per question (derived)
- Reading a stem: the form the answer must take and the sense it must carry
- Root analysis: Greek and Latin elements that give away a word's meaning
- How this book is organised and the dictionary standard it follows
Where One-Word Substitution Appears in CGL and CHSL 2026
The SSC notices name one-word substitution in three of the four English papers that this book covers. The CHSL 2026 notice lists it in the Tier-I English syllabus at para 13.10.1 and in the Tier-II English syllabus at para 13.11.3. The CGL 2026 notice lists it in the Tier-II English syllabus at para 13.11.3.1. The CGL 2026 Tier-I English Comprehension description at para 13.10.4 says the paper tests correct English, basic comprehension and writing ability, and it gives no topic list, ending with 'etc.', so it does not rule the topic out. Because that description is open-ended and Tier-II names the topic outright, a CGL candidate should prepare one-word substitution for both tiers. The notices list these as syllabus lines and do not say how many items each topic receives.
The language rules differ by paper, and they decide the language in which a stem is written. The CGL 2026 notice sets English Comprehension in English only in Tier-I (para 13.8.1). In CHSL 2026 Tier-I, para 13.8.1 allows Parts II, III and IV to be set in Hindi or in a language opted in the application. Part I is not on that list, so the English Language paper is set in English. In CGL 2026 Tier-II, para 13.9.7 keeps the English Language and Comprehension part of Paper-I Section-II in English only, and in CHSL 2026 Tier-II, para 13.9.10 makes the English module, Section-II Part A, English only. Every stem in this book is written in English for the same reason.
| Paper | English questions | Maximum marks | English sectional timer | Negative marking |
|---|---|---|---|---|
| CGL 2026 Tier-I (English Comprehension) | 25 | 50 | 15 minutes, within a 1-hour paper | 0.50 per wrong answer |
| CGL 2026 Tier-II (Paper-I, Section-II Part A) | 45 | Not stated per part; 45 × 3 = 135 (derived) | 40 minutes, within Section-II's 1 hour | 1 mark per wrong answer |
| CHSL 2026 Tier-I (Part-I, English Language, Basic Knowledge) | 25 | 50 | 15 minutes, within a 60-minute paper | 0.50 per wrong answer |
| CHSL 2026 Tier-II (Section-II Part A) | 40 | Not stated per part; 40 × 3 = 120 (derived) | 40 minutes, within Section-II's 1 hour | 1 mark per wrong answer |
Marks, Negative Marking and the Arithmetic of a Guess
Tier-I English is 25 questions for 50 marks, so each correct answer earns two marks (derived from the notice totals). Each wrong answer costs 0.50 marks in both CGL 2026 and CHSL 2026 Tier-I (CGL 2026 para 13.8.2; CHSL 2026 para 13.8.2), and an unattempted question scores zero. In Tier-II, Sections I to III carry a deduction of one mark for each wrong answer (CGL 2026 para 13.9.8; CHSL 2026 para 13.9.11). The Section-II rows of the scheme tables write the totals as 70*3 = 210 marks in CGL 2026 and 60*3 = 180 marks in CHSL 2026, so each correct Tier-II English answer is worth three marks. Relative to the gain, a Tier-II wrong answer costs one-third of a correct answer's gain, against one-quarter in Tier-I.
The expected value of a blind guess shows what that means in practice. Take a four-option Tier-I item with no idea of the answer. Each option has a probability of one-quarter of being right, so the expected value is 2 × 1/4 + (-0.50) × 3/4 = 0.50 - 0.375 = +0.125 marks. The same blind guess under Tier-II marking is 3 × 1/4 + (-1) × 3/4 = 0.75 - 0.75 = 0. These are derived expectations, not SSC figures, and they assume the options are equally likely, which a real item does not guarantee. They still show the pattern: a blind four-option guess has a small positive value in Tier-I and no value in Tier-II, so the same instinct to guess carries different risks in the two papers.
| Options still possible | Tier-I expected value of a guess | Tier-II expected value of a guess |
|---|---|---|
| 5 (hypothetical, to show the break-even point) | 0 | -0.20 |
| 4 | +0.125 | 0 |
| 3 | +0.333 | +0.333 |
| 2 | +0.75 | +1.00 |
Sectional Timers: How Much Time One Question Gets
Each subject has its own sectional timer, and time not used in one subject cannot be carried into another. CGL 2026 Tier-I runs for one hour with a 15-minute sectional timer for each of its four subjects, which leaves 15 minutes for English Comprehension (1 hour 20 minutes for candidates eligible for a scribe). CHSL 2026 Tier-I runs for 60 minutes with the same 15-minute timer per subject (80 minutes for scribe-eligible candidates, with 15 + 5 minutes per subject). In Tier-II, Section-II runs for one hour. Inside it, the English part has a 40-minute sectional timer and General Awareness has 20 minutes, in both the CGL 2026 and CHSL 2026 schemes.
Seconds per question come from one line of arithmetic: sectional minutes multiplied by 60, divided by the number of questions. For CGL Tier-I English, 15 × 60 = 900 seconds, and 900 ÷ 25 = 36. For CGL Tier-II English, 40 × 60 = 2,400 seconds, and 2,400 ÷ 45 is about 53.3. For CHSL Tier-II English, 2,400 ÷ 40 = 60. These are averages across a paper, not times that SSC publishes for any item. They work as a pace check. In Tier-I, a stem still unresolved after 72 seconds has already used twice the average of 36 seconds, and that is the point to leave it and move on, because the timer does not pause for a stuck question.
| Paper | English questions | English sectional timer | Seconds per question (derived) |
|---|---|---|---|
| CGL 2026 Tier-I | 25 | 15 minutes | 36 |
| CGL 2026 Tier-II | 45 | 40 minutes | about 53 |
| CHSL 2026 Tier-I | 25 | 15 minutes | 36 |
| CHSL 2026 Tier-II | 40 | 40 minutes | 60 |
Reading the Stem: Form, Sense and Grammatical Clues
A one-word substitution stem describes something in a phrase and asks for the single word that means the same. The first job is to fix the form the answer must take, because the opening of the stem usually gives it away. 'One who' and 'a person who' call for a noun for a person. 'Capable of being' and 'that which can be' call for an adjective, usually ending in -ible or -able. 'A state of' and 'the condition of' call for an abstract noun. 'To make' and 'to cause to be' call for a verb. 'A place where' calls for a noun naming a place, and 'fear of' calls for a noun ending in -phobia. The table below gathers these openings, the form each requires and the suffixes that most often carry it.
Grammar and sense work in two stages. The first stage removes options whose part of speech cannot fill the slot. An adjective answer must fit beside a noun or after a linking verb, and a noun answer must fit where the stem's noun phrase sits. Put each option into the stem's own sentence and check the form first. The second stage checks the sense. Many distractors pass the form test and fail the meaning. 'Sporadic' is an adjective meaning occurring occasionally or in irregular instances, so it passes the form test for any adjective stem about occurrence, but it fails a stem about something present everywhere at once.
When two options pass the form test, the sense decides. Take a stem that asks for an adjective for a person who is easily angered. Both 'irascible' and 'indolent' are adjectives describing a person, so the form test does not separate them. The sense does. Irascible means marked by hot temper and easily provoked anger, while indolent means averse to activity, effort or movement. The words 'easily angered' are the decisive clue, and a candidate who reads them before the options will not be drawn to the lazy one.
| Stem opening | The answer is a | Suffix pattern to look for |
|---|---|---|
| one who; a person who | noun for a person | -ist, -ian, -er |
| capable of being; that which can be | adjective | -ible, -able |
| a state of; the condition of | abstract noun | -ity, -ness, -ence, -ism |
| to make; to cause to be | verb | -ify, -ize, -ate, -en |
| a place where | noun for a place | -ary, -ory |
| fear of | noun for a fear | -phobia |
| study of; a branch of knowledge | noun for a field of study | -ology |
| killing of; one who kills | noun for the act or the killer | -cide |
Root Analysis: Prefixes, Suffixes and Stems That Give Away the Answer
Many one-word substitutes are built from Greek and Latin elements whose core meanings the dictionary states, so a candidate who knows the element can often reject a wrong option without knowing the word. The suffix -cide comes from the Latin caedere, 'to cut, kill', and the combining form means killer or killing. The suffix -phobia comes from the Greek phobos, fear, and means exaggerated fear of something. The suffix -archy comes from the Greek archein, 'to rule', and means rule or government. The suffix -cracy comes from the Greek kratos, 'strength, power', and means a form of government. Because -archy and -cracy both name systems of rule, a root alone does not settle a stem. The stem's own wording decides which system it describes.
Other suffixes describe a person by what he or she does, eats or loves. The suffix -phile comes from the Greek philos, 'dear, friendly', and means one having a strong attraction to something. The suffix -vore comes from the Latin -vorus and means one that eats the thing the prefix names. The suffix -graph comes from the Greek graphein, 'to write', and means something written or drawn. The suffix -ist, in one of its senses, means one who advocates a doctrine, and in another, one who performs an action or specialises in a field. The suffix -ous, from Latin -osus, means full of or having the qualities of. The suffixes -ible and -able, from Latin -ibilis and -abilis, mean capable of being or worthy of.
Age words are the clearest case of a root giving the answer. The prefix counts tens, not years, and the suffix -genarian names a person whose age falls in that decade. A septuagenarian is in the seventies, an octogenarian in the eighties, a nonagenarian in the nineties, and a centenarian is 100 or older. The trap is that octo- means eight, so a candidate who reads it as eight years old will look for the wrong word. The table below gives the prefix origins and the age ranges Merriam-Webster gives for each word.
