Difference between "seems like, as if, appears to be"

Greetings to all members:
How to use the following Phrases (Differentiates).
For example:
" It seems like they are having a trouble to take the exam."
" The Questionaires appear to be difficult why most of the students are having trouble to take the exam.
" As if the students don’t want to take the exam because the questionaires were so difficult.
I need your comments fellow members. Please, correct me if they aren’t in the proper grammar.
Thank you for your immediate response. :roll:

" It seems like they are having a trouble to take the exam."

[color=red]" It appears that they are having some difficulties taking the exam."

" The Questionaires appear to be difficult why most of the students are having trouble to take the exam.

[color=red]" Most of the students seem to be having problems with the difficult questions."

" As if the students don’t want to take the exam because the questionaires were so difficult.

[color=red]" The students didn’t want to take the exam because the questions appeared to be so difficult."

Hi, mr. kitostad,
I really appreciate the correction you made.
thank you.
adonis :smiley:

Hi Mr.Kitosdad,

Thank you very much for your post. Love to know that you are still here.
One of my uncle also living in Germany.
So thank you again.
Manuri

Uh, Kitosdad’s post is dated May 2009. However, as far as I know, he is still with us.

Oh Thank you very much Mr.Micawber.
I really appreciate your work for us here.
Hat off for Mr.Micawber…

Manuri

hi.mr. kitostad,
I still don’t know the differences between :as if - appears to be - and- seems like -
will you please make it clearer for me .
thanks very much - DRISS