or in two consonants or in two vowels”, make no change, e.g. say + ing
=  saying,  push  +  ing  =  pushing.  If  the  last  syllable  of  a  longer  verb  is stressed,  double  the  consonant  before
–ing,  e.g.  forget  +  t  +  ing  = forgetting.
C. Previous Related Study
The  research  about  students  ability  in  learning  gerund  has  been  done  by Ade  Laili  Akhiliyyah  in  2009
under  the  title  “Analysis  on  the  Difficulties Faced by the Students in Learning Gerund at the First Grade of MTs Daarul
Amal Bekasi”. She did this research to know not only their mistakes but also their  reasons  why  the  students  made  mistakes.  The  result  of  that  research  is
the  students  were  still  difficult  in  determining  uses  of  gerund  especially  in determining the uses of gerund as object of preposition and gerund as direct
object of certain verbs. A  year  later,  Leti  Lisdianty  did  a  reasearch  about  Gerund  in  2010  under
the  title  “Analysis  on  Students’  Difficulties  in  Distinguishing  Gerund  and Present  Participle  in  Sentences  at  XI  Grade  Students  of  SMA  PGRI  56
Ciputat,  Tangerang ”. This  research  was made by  her to know the students’
comprehension about gerund and present participle. In fact, the result of that research she found that  there were many students who could  not  distinguish
the Gerund and the Present Participle. Based  on  the  researches  that  have  been  done  by  Ade  Laili  Akhiliyyah  in
2009  and  Leti  Lisdianti  in  2010.  The  researcher  concludes  that  some researchers  found  out  that  students  still  have  difficulties  in  differentiating
gerund and present participle, in determining  the uses of gerund as object of preposition  and  gerund  as  direct  object  of  certain  verbs.  According  to  the
writer’s research, the students also still have lack of knowledge of the rules on adding
–ing to the verb when forming gerund. The writer hopes that this research  will  be  useful  for  the  teacher  or  another  researcher  who  wants  to
re search about students’ error especially in learning and using gerund.