Mona Vanderwal died because Spencer found out she was A so Mona tried to push Spencer off a cliff but instead Mona falls off and dies.
Alison DiLaurentis killed Jenna Cauvanagh by throwing her in a Plumbing hole because Jenna knew to much about the Courtney and Alison switch.
Ian was trying to kill Spencer because she knew to much. They were at the church because Spencer went to go and find he sister's phone. Ian appeared and Spencer distracted him by throwing a USB of 'Home movies' he made of the girls when they were younger. She runs up to the tower where the bell is, and he tries to throw her off. But Spencer manages to call Aria, Hannah and Emily, But then Spencer drops he phone and Aria, Hannah and Emily hear what's going on when they answer the phone. They immediately go to the church. Meanwhile, Ian is holding Spencer over a ledge to drop her at least fifteen feet to her death. Then Ian goes to push Spencer off but Spencer manages to grab on to Ian's arm's. Then someone comes in (Which I think it was -A) and flips Ian off. The stranger leaves and Spencer crawls back up. But Ian didn't die because he got away some how but he was killed later on by -A apparently because he knew to much about "A".
Courtney DiLaurentis was killed by her twin sister Alison because Courtney was a little bit crazy and was meant to be sent to a mental institution. But they accidentally sent Alison away. When Alison was gone Courtney pretended to be Alison like she always wanted. Courtney found out all of the girls secret's (The 4 girl's did not know about the switch) and put them all in a diary. When Alison came back she found out what Courntey did and she killed by strangling her and then pushed her in a hole. After that Mona becomes -A until she dies and then the real Alison becomes -A. (They know all of the girls secret's because they found Courtney's book)
The real Alison DiLaurentis dies in the 8th book. Supposedly because she is inside a burning house when it collapses but that is never confirmed.
The 4 girls do find out that Alison never died and that it was Courntey who did. And also find out that Mona and Alison (the real Alison) is -A. They only find out that Alison is -A untill the end.
P.S. The real Alison was the Queen bee of the school and she hated the 4 girls.
Sorry it is so long but i hope I helped :)
None of the Liars are going to.
No.
No, Spencer from Pretty Little Liars does not die.
Ezra did not die on Pretty Little Liars.
No, Kate doesn't die in Pretty Little Liars
nop
no Alyson was the one that died on pretty little liars
YES she gets murdered... So sad
no she does not
David O'Brien of Pretty Little Liars died after acquiring AIDS.David O'Brien of the Pretty Little Liars dies after succumbing to AIDS.
No.No, Hannah didn't die on Pretty Little Liars
yes she does