Rule | Examples | Memorise |
1. ‘ie’ or ‘ei’
i) Write i before e, except after c
ii) Write ie after c for words with a shensound.
iii) Write ei when the vowels sounds like an a as in 'weigh' | i)achieve, believe, friend receive, receipt, perceive
ii)ancient, efficient, sufficient, conscience
iii)neighbour, vein, reign, rein, deign | Exceptions: Words like counterfeit, either, neither, height, leisure, forfeit, foreign, science, species, seize, weird |
2. ‘s’ or ‘es’
i) Add es if a word ends in ch, sh, ss, xor z
ii) Add es for most words ending in o | i)arch > arches, clash > clashes, class > classes, box > boxes, quiz > quizzes
ii)tomato > tomatoes, hero > heroes, go > goes, do > does, echo > echoes | Exceptions: Words like altos, duos, pianos, radios, solos sopranos, studios, videos, typos |
3. ‘y’ to ‘i’ or not
i) For words ending in y preceded by a vowel, retain the y when adding s or a suffix.
ii) For words ending in y, retain the y when adding ing.
iii) For words ending in y, preceded by a consonant, change the y to i before any other suffix | i) convey > conveys, employ > employer
ii) try > trying, justify > justifying, certify > certifying, study > studying
iii) try > tried, justify > justifies, certify > certifiable, mystify > mystified, laboratory > laboratories | Exceptions: Words like dryness, shyness |
4. drop the final ‘e’
i) DROP the e when the suffix starts with a vowel.
ii) DROP the e when the word ends indge.
iii) DROP the final e when adding -ing | i)save > savable, use > usable
ii)judge > judgment
iii)save >saving, manage > managing, trace > tracing, emerge > emerging | Exceptions:DO NOT DROP the e if the word ends in ce or ge (e.g. manage > manageable, trace > traceable) |
5. ‘t ’ or ‘tt’ when adding -ing, - ed and some suffixes to verbs
i) DOUBLE the t for verbs of one syllable with a single vowel, or a short vowel sound.
ii) DOUBLE the t for verbs of more than one syllable when the stress is on the last syllable. | i)rot > rotting, rotted, rotten fit > fitting, fittedknot > knotting, knotted
ii)abet > abetting, abetting allot > allotting, allottedcommit > committing, committed emit > emitting, emittedforget > forgetting, forgotten (but forgetful) | Exceptions:DO NOT DOUBLE the t for verbs of one syllable with a double vowel or a long vowel sound (e.g. treat > treating, treated; greet > greeting, greeted) |
6. ‘r’ or ‘rr’ when adding -ing, - ed and some suffixes to verbs
i)DOUBLE the r for verbs of one syllable when the final r is preceded by a single vowel.
ii)DOUBLE the r for words of more than one syllable when the stress does not fall on the first syllable. | i)star > starring, starred, starry tar > tarring, tarredwar > warring, warred (but warfare) scar > scarring, scarredstir > stirring, stirred
ii)concur > concurring, concurred, concurrence occur > occurring, occurred, occurrence defer > deferring, deferred, (but deference) deter > deterring, deterring, deterrentinfer > inferring, inferred, (but inference) prefer > preferred, preferring, (but preference) refer > referred, referring, referral | Exceptions:DO NOT DOUBLE the r for verbs of one syllable when the final r is preceded by a double vowel (e.g. fear>fearing, feared)DO NOT DOUBLE the r for words of more than one syllable, when the stress falls on the first syllable (e.g. prosper > prospered, prospering) |
7. ‘l’ or ‘ll’ when adding -ing,-ed and some suffixes to verbs DOUBLE the l when it is preceded by a single vowel. | cancel > cancelling, cancelled, cancellation enrol > enrolling, enrolled (but enrolment) fulfil > fulfilling, fulfilled, fulfillmentlevel > levelling, levelledtravel > travelling, travelled, traveller | Exceptions: DO NOT DOUBLE the lwhen it is preceded by a double vowel (e.g. conceal> concealing, concealed) |
8. Dropping letters Many words drop a letter when adding a suffix, but it isnot always the final letter | argue > argument; proceed > procedure; humour > humorous; disaster > disastrous; repeat > repetition; administer > administration | There is no reliable rule covering these words, so they simply have to be memorised. |
9. Word endings such asable/ible, ant/ance; ent/ence | negligible, incredible, invisible, sensible, admirable, preventable, suitable, dependable attendance, ignorance, nuisance, importance sentence, difference ,independence, intelligence | There is no reliable rule covering these words, so they simply have to be memorised. |
10. Silent letters Some words include letters which are not pronounced when the word is spoken. | advertisement, campaign, column, debt, design, doubt, gauge, ghetto, heir, knife, knowledge, island, mortgage, often, pneumatic, rhythm, solemn, subtle | There is no reliable rule covering these words, so they simply have to be memorised. |
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