是倒装句吧

是倒装句吧
Somewhat more promising have been recent experiments for releasing capillary water (water in the soil) above the water table by injecting compressed air into the ground.是倒装句吗?recent experiments for releasing capillary water (water in the soil) above the water table by injecting compressed air into the ground have been Somewhat more promising 这样改对吗?
have been 后面不应该是动词吗，为什么会是experiment