What's the difference between 이 and 이것 ?
이 means this and 이것 means this one. 이것 Is a noun and so it's being compounded with particles. 이 Needs a noun that it refers to.
When do i use 이/그?
이 is this, and 그 is that when it is close to the speaker.
그 when it is close to the listener, away from the speaker. Cmiiw.
Why is 이 학생입니다 wrong??
how do you know when it is close or far away from the speaker?
If it is close to the speaker they will say 이. In that case you as the listener will say 그 about the same object
It's the same way in english. You say this, that, over there and etc based on where you and the object are
why isnt 학생이 an answer to select??