I use STM32F4, if i close systick interrupt, then use vTaskDelay,what will be happen?

vTaskDelay will be returns immediately? or This Task will never run anymore?

If the time resp. the ticker stops the delay never expires. Only the systick drives the scheduler. So stopping it stops the scheduler.
Why would you stop the systick at all running a FreeRTOS application ?

Thanks, I want to confirm it!