在词尾加er,r ,双写加er 或or:A. play _ player, sing _ singer, wait _ waiter , find _ finder,thrill _ thriller,farm__farmer,work___worker,B. write _ writer, drive _ driver, come _ comer, explore _ explorerdance _ dancerC. run _ runner, win _ winner, rob _ robber, traval _ travallerD. visit _ visitor, invent _ inventor
在词尾加ing:build _ building, draw _ drawing, end _ ending, begin _ beginning,swim _ swimming， skate _ skating, feel _ feeling, say _ saying,mean _ meaning, cross _ crossing， surf _ surfing, paint _ painting
在词尾加ion 或去e加ion:A. decide _ decision, describe _ description, produce _ production,celebrate _ celebration,pronounce _ pronunciation, decorate _ decorationgraduate _ graduation,frustrate - frustration,pollute _ pollutioncontribute _ contribution, congratulate _ congratulation,educate _ education，organize _ orgnization,donate _ donation,appreciate _ appreciation，operate _ operation, invite _ invitationB. discuss _ discussion, invent _ invention, attract _ attractionimpress _ impression,inject _ injection,instruct _ instruction
其它：know _ knowledge, please _ pleasure, enjoy _ enjoyment,practise _ practice， die _ death, succeed _ success, weigh _ weight,sit _ deat, change _ chance，enter _ entrance,fly _ flight,rob _ robbery, discover _ discovery，faile _ failure,appear _ appearance,breathe _ breath