i try flash openrecovery-twrp-2.8.4.1-yuga by flashboot when i'm done my phone couldn't boot to rom, please help me
Did you do something like typing "fastboot flash boot <name of openrecovery file>" in Windows?
If you did then you have flashed a recovery image onto your phone's boot partition (the recovery image needs to be written to the FOTAKernel partition which if I remember correctly cannot be done with fastboot, it needs to be written to the FOTAkernel partition using either an Android app like Rashr or by using the dd command in a terminal window on the phone or via adb from the PC once the phone has booted to Android or by flashing within a suitable recovery).
To boot to Android you need to get a boot.img file from somewhere, the simplest way is to extract it from a ROM image .zip file, and then flash that in the same way you did the openrecovery image "fastboot flash boot boot.img".
If you have a copy of the openrecovery image saved on your phone then you can use the recovery you boot into now to flash a copy where it belongs on FOTAKernel first and then use fastboot to put a boot.img in the boot partition or use the recovery to dirty flash the current ROM over itself which should fix the boot partition.
Otherwise, if you don't have a copy of openrecovery saved on your phone, once you have fixed the boot partition as above and booted to Android on your phone you can then sort out the recovery.
twrp install instructions are here:
http://teamw.in/project/twrp2/187/