Kara is short and a,
little
She has
hair and
eyes.​

1- john is having lunch in the cafeteria now.
is john having luch in the cafeteria now?
john isn't having lunch in the cafeteria now.

2- listen! that's mary who is playing.
listen!   is that mary who is playing?
listen! that isn't mary who is playing.

3- at present they are traveling in south america.
are they traveling in south america  at present?
at present, they aren't traveling in south america.

4-  for the time being, mr. smith is acting as manager of this departament.
is mr. smith acting  as manager of this departament for the time being?
for the time being, mr. smith isn't acting  as manager of this departament.

5-  be careful! the teacher is  watching.
be careful! is the teacher watching?
be careful! the teacher isn't watching.

6-  they are having sales in all the big stores now.
are they having  sales in all the big stores now.
they aren't having  sales in all the big stores now.

Were's john? he is in the kitchen.

To: é utilizado para endereçar a algo ou alguém. 
ex:
-  we have to go to the beach.
- i will write a letter for you (a carta, neste caso, é minha e eu estou apenas escrevendo-a para você)

for: é utilizado para se referir a fazer algo por alguém. 
ex:  
- yes, i can read the letter for you.

French e irish. espero ter ajudado.