Question

I've been to Australia last year.
She's been to lunch. She'll be back in an hour.
I was living in China when I was a child.
I am working for a small company since I left school.
When I was a child were playing the street after school.
When our new teacher walked into the room I knew I saw her before
I am living here all my life.​

Answer 1

Answer:

what to do with these sentences?

Answer 2

Answer:

What we have to do with these sentence