请英语高手指导一下，这四个表示“拒绝”的动词究竟用在怎样的语境中啊

refuse 是拒绝的意思 ,
reject 也是拒绝的意思,但是它还有抵触的意思,比refuse程度更强烈,
turn down
是减小的意思
例如 please turn down the TV请把电视的声音调小一点
decline是下降的意思
,也有拒绝的意思,不过它是委婉的拒绝,程度很轻

1. A lot of young people tend to reject the concepts of their parental generation/A lot of young people tend to refuse to accept the concepts of ....

2. The government rejected/turned down the plan to reduce/lower the taxes.

3. Due to the lack of experiences, he was turned down by that company/that company declined his application.

4. We have a very strict quality management/control system, and any products that do not meet the criteria will therefore be rejected.

5. I know he is having a hard time right now. But he refused to accept all my help/But all my help has been declined by him.

6. reject/turn down

7, refuse

8. turn down/reject

9. decline

10-13 turn down

如你所述，这些词汇都表示“拒绝”的意思，但至于如何区别不同的用法， 我觉得很难说明。答案可能是英文惯用语的问题。