Oraciones en pasado pero sobre mi vida o la vida de alguien?

1. I called my mom yesterday.

2. I went to US to study english.

3. I used my favorite t - shirt on friday.

4. I worked in a small office.

5. I stayed with her all the day.

6. I got sick one month ago.

7. I lost my first cellphone.

8. I walked with my best friend this morning.

9. I played with a child in the park.

10. I asked for help yesterday night.