(+) i am a student
(+) i am a teacher
(+) i am a doctor
(+) i am a desainer
(+) i am a girl
(-) i am not student
(-) i am not  a teacher
(-) i am not a doctor
(-) i am  not a desainer
(-) i am not a girl

(+) i had gone to surabaya
(-) she hasn't known doni's name
(?) has she returned tono's book ?
(+) cika has cooked fried rice
(-) i had not corected the task
(?) has he gone to school?