Помогите исправить ошибки.
I have been a teacher since three years.
Helen is not her. She is gone to the cinema.
We drove slowly through the heavy traffic.
Where is the girl go?
He has already came home.

Во втором предложении вроде She HAS gone to the cinema.

I have been a teacher for three years.Helen is not here. She is gone to the cinema.We drive slowly through the heavy traffic.Where did the girl go?He has already came home. - а вот это не уверена, может already в конец предложения перенести или has убрать, не знаю.