Chodzi o prefixy, czyli te: il, un, ir, dis, mis, re, out, anti, non, over, ex, under itd przed słówkami, głównie o zasadę is stawiania. Zadanie z podręcznika "Train Your Brain | Prefixes" w załączniku.

1. un/friendly - unknown 1. im/possible - immature - niedojrzaly 3. il/logical - illegal - nielegalny 4. in/efficient - incapable 5. ir/rational - irresponsible 6. dis/satisfied - dissapointed 1. misunderstand (...) - with a mistake in meaning 2. rewrite,retake, remarry - do sth again, take sth again 3. overlong , overemphasize - too much 4. subzero, subtitles- too little 5. unconditional, unusual - without, not 6. outnumber (...) - to surpass the standard (przewyzszac normę) 7. prepay, prewash- former 8. antisocial, antibiotics - against