1) swim  a) swimming b) swiming 2) have a) haveing b) having c) haveng 3) shop a) shopping b) shoping 4) Write a) Writeing b) Writeng c) Writing 5) stay a) staiing b) staying 6) come a) Comming b) Comeing c) Coming 7) Stand a) Standding b) Standing 8) Leave a) Leaveing b) Leaving 9) Sing a) Singing b) Singging 10) Work a) Workking b) Working 11) Brush a) Brushshing b) Brushing 12) Say a) Saiing b) Saying 13) Sit a) Siting b) Sitting

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