We use for with a period of time.

I have had a pet for three months.

The students have studied at university for two years.

We use since with a point in time in the past.

Our boss has been in a meeting since 10 a.m.

I have lived here since my birth.

1. Sam has worked at the factory for since ten years.
2. The café has been open for since yesterday.
3. Chris and I have lived here for since 2010.
4. The radio has been on for since ten hours. Turn it off, please.
5. I have wanted to become an engineer for since my childhood.
6. Kyle has studied astronomy at university for since one month.
7. Sue hasn't seen her best friend for since last weekend.
8. My parents haven't visited Paris for since 2005.