1) stop + ed a) stopped b) stoped 2) quit + ing a) quiting b) quitting 3) sink + ing a) sinkking b) sinking 4) flap + ing a) flapping b) flaping 5) cover + ed a) coverred b) covered 6) run + er a) runer b) runner 7) red + er a) redder b) reder 8) quick + ly a) quickkly b) quickly 9) fast + est a) fastest b) fasttest 10) dark + ness a) darkness b) darkkness

1-1-1 Doubling Rule

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