What are they doing?
 He is rideing a bike.
 She is riding a bike.
 He are riding a bike.
 He is riding a bike.
 I am tieing my shoes.
 I am tying my shoes.
 I is tying my shoes.
 I are tying my shoes.
Mom is writing an e-mail.
Mom is writeing an e-mail.
 Mom are writing an e-mail.
 Mom am writeing an e-mail.
Sam is swimming.
Sam is studying.
Sam is sleeping.
 Sam is eating.
 Joe and Tom are joging.
 Joe and Tom is jogging.
  Joe and Tom is joging.
Joe and Tom are jogging.
Charlie is not doing homework.
Charlie is do homework.
Charlie is doing homework.
Charlie doing homework.
 I'm not chewing gum.
 I'm chew gum.
 I'm chewing gum.
 I chewing gum.
 We are swiming.
 We swimming.
 We are swim.
 We are swimming.
 Dad reading a book.
 Dad is read a book.
 Dad is reading a book.
 Dad isn't reading a book.
 Mary and I are eat breakfast.
 Mary and I eating breakfast.
Mary and I are playing soccer.
 Mary and I are eating breakfast.
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