Where did Ali disappear to on Pretty Little Liars?

Answer 1

since Courtney was pretending to be Ali, then Ali (who was pretending to be Courtney) lived in a mental institution because the REAL Courtney had a mental problem and lived in institution most of the time.

Answer 2

alison was the it girl of rosewood day but she had an identical twin sister whos name was courtney, who was mental because she kept wanting to be ali. when she was at home (not in a mental hospital) she swapped places with ali and her parents thought ali was courtney pretending to be ali. ali was sent to a mental hospital in courtneys place while courtney lived the life ali should have had. on the night ali (courtney) disappeared courtney went to go and meet Ian and her sister ali killed her for revenge. she also killed ian, jenna and nearly all the Pretty Little Liars + melissa. so really ali was the pyshco.

**note this is all in the books**
Alison never dies. Ali has a twin sister named Courtney. Courtney was in a mental hospital and when Ali and her family went to visit, Courtney convinced Ali's parents that she was Alison. Then the real Alison goes to a mental hospital. When the real Ali comes to Rosewood for revenge, she kills Courtney as payback for putting her in a mental hospital.

Answer 3

alison has a twin sister called Courtney.

on the night "alison" died, it was actually Courtney who died pretending she was alison.

who killed Courtney? alison. the real alison.

Answer 4

she went in the woods , to meet ian thomas . he choked her to death.

Answer 5

Ali isn't dead, Courtney is. (Ali's twin)