1.All means has been tried.
has改have
2.Elizabeth Fry devoted herself to help improve prison conditions.
help改helping to
3.She is kind and considerate for her neighbours.
and前加to,for改of
4.Some parents often say that teacher's words effects their children a lot.
teacher's改成teachers',effects改成affect
5.The teacher and writer have already come to the meeting.
have改has
6.Alice,as well as two boys,were punished for having broken the rule in the class.
were改was
7.Her words encouraged me to making an apology to my English teacher.
making改make
8.Three days are not enough to finish the work.
are改is
9.Between the two windows hangs two small pictures.
hangs改hang