Is it a correct sentence? Set 2 | Inversion

Not only did he complete the marathon, but he also set a new record.

Did he not only complete the marathon, but he also set a new record.

Under no circumstances will I tolerate such behavior

Under no circumstances I will tolerate such behavior

Little did she know that her life was about to change forever.

Little she did know that her life was about to change forever.

Only after the storm subsided could we assess the damage.

Only after the storm subsided we could assess the damage

In the depths of the forest lies a hidden treasure

In the depths of the forest lie a hidden treasure

Only when the sun sets does the city truly come alive.

Only when the sun sets the city truly does come alive.