Particles

Question 1

At, in, on, etc.

location of the action or event

Answer 1

で

Example:
としょかんで　べんきょうします。
Studying at the library

Question 2

At, on, in

Point in time

Answer 2

に

Example:
じゅうじに　ねます。
Going to bed at 10

Question 3

to (goal, activity)

Answer 3

に

Example:
クラスに　いきます。
Going to class

Question 4

to (direction)

Answer 4

へ

Example:
がっこうへ　いきます。
Going to school

Question 5

Direct object marker

Answer 5

を

Example:
ほんを　よみます。
Reading a book