Could you check my sentences. Thank you very much

1. They used to work that she would forget them when she got famous.
2. She used to tell them that would never happen.
3. She would always call, and go to see them when she was in town.
4. They would thing about her every time they turned on the radio.
5. They used to know her when she was plain old 'Jenny'!.

1. "used to work that" is awkward and confuses me about that sentence. Can you restate that more simply?

2. OK

3. Remove the comma; then it'll be OK.

4. Correct the spelling of one word, and it'll be OK.

5. OK