Race, racial, radical, radio, rage, railway, rain, rainy, raise, ramble, random, range, ranger, rank, rape, rapid, rapidly, rarely, rate, rather, ratio, rational, raw, reach, react, reaction, read, readily, reading, ready, real, realistic, reality, realize, really, reason, reasonable, recall, receive, recent, recently, reckon, recognize, recommend, record, recorder, recover, recovery, recreation, recycle, red, reduce, reduction, redundant, refer, reference, reflect, reform, refuse, refusal, regain, refresh, regard, regardless, region, register, regret, regular, regularly, regulation, reinforce, reject, rejection, relate (注意该词的词义), relation, relative/related, relax, release, relevant, reliable, relief, relieve, religion, reluctant, rely, remain, remark, remarkable, remedy, remember, remind, remote, remove, render, renew, rent, repair, repeat, repeatedly, replace, replacement, reply, report, represent, representative, reputation, request, require, rescue, research, reserve, resemble, resident, resign, resist, resolve, resort, resource, respect, respective, respond, response, responsible, rest (注意该词的跨词类用法), restore, restrain, result, resume, retail, retain, retire, retirement, return, reveal, review, revive, revolution, reward, rewarding, rid, ride, ridiculous, right (注意该词的跨词类用法), right-handed, ring, rise, risk, risky, rival, river, rock (注意该词的跨词类用法), rocket, romantic, room (注意该词的词义), root, rope, rough, roughly, round, rubber, rubbish, rude, ruin, rule, run, rural, rush

　　S

　　Sacrifice, sad, safe, safeguard, safely, safety, sake, salary, sale, salt, same, sample, sand (注意该词单复数的词义差异), satellite, satisfactory, satisfy, satisfying, save, savings, say, saying, scale, scarcely/hardly/seldom/rarely, scatter, scene, scenery, schedule, scheme, scholarship, science, scientific, scold, score, Scotland, scream, screen, seal, search, season, seat, second, secondary, secondly, secretary, section, secure, see(注意该词的短语) , seek, seem, seize, select, self, selfish, send, senior, sense, sensible/ sensitive, sentence, separate, September, series, serious, seriously, serve, service, set (注意该词的短语), setback, settle, settlement, severe, severely, sexual, shake, shall, shallow, shame, shape, share, sharp, sharply, sheer, shift, shine, shock, shoot, shop, shopping, short, shortage, shortcoming, shorten, should, shout, show, shrink, shut, ,shy, sick, side, sight, sign, signal, significant, silence, silly, similar, similarly, simple, simple, since, sincere, Singapore, single, sink, sit, site, situation, size, skill, skilled, skillful, skin, sky, sleep, sleepy, slide, slight, slightly, slow, small, smart, smell, smile, smoke, smoker, smooth, smoothly, snake, snow, snowy, so, so-called, soccer, social, society, soft, soften, software, soil, sole, solid, solution, solve, some (注意该词的用法), somehow, something, sometime, sometimes, somewhere, song, soon, sorrow, sorry, sort, soul, sound(注意该词的跨词类用法), soup, source, south, space, spacious, Spain, Spanish, spare, speak, special, specialist, specially, species, specific, speculate, speech, speed, spend, spirit, spite, splendid, split, spoil (注意该词的用法), spoken, spokesman, sport, spot (注意该词的用法), spread, spring, spur, stable, staff, stage, stand(注意该词的短语), standard, stare, start, state (注意该词的用法), statement, status, stay, steady, steal, steam, steel, step, stick, stiff, still, stimulate, stir, stock, stop, storage, store, straight, strange, stranger, strategy, strength, strengthen, stress, strict, strictly, strike, striking, strong, strongly, structure, struggle, student, study, stuff, sturdy, stupid, style, subject, subjective, submit, substance, substantial, substitute, subtle, suburb, succeed, success, successful/successive, such, suffer, suffering, sufficient, suggest, suit, suitable, sum, summit, sunny, super, superior, supermarket, supervise, supply, support, suppose, sure, surface, surpass, surprising, surrounding, survey, survive, suspect, sweet, symbol, sympathetic, symptom, system.