Ka tolong dibantu mencari kesalahannya, nomor yang ganjil aja... Tks

Nomor 1 salah seharusnya :
She has left when i arrived

Nomor 3 salah seharusnya :
I have been doing my homework

nomor 4 salah seharusnya :
I will eat

Nomor 5 salah seharusnya :
I was reading novel yesterday

Nomor 6 salah seharusnya :
Im reading a novel

Nomor 7 salah seharusnya :
Jhon was writting the letter yesterday

Nomor 8 salah seharusnya :
She didn't learn english every tuesday

seterusnya sebentar lagi ya