We will
not pay for your crisis.
我们不会为你们的危机付款
This course is limited to 12 people and costs $150.
这门课程限招12人,费用为$150.
By the end of the holiday I had spent all my money.
到那个假期结束时我已经花光了我所有的钱.
pay for 表示付款,买单.cost 和spend都表示花费,不过前者物做主语,后者人做主语.