Inversion

We don't ask the teachers for their opinion very often.

• Seldom ask we the teachers for Seldom as we the teachers for their opinion very often
• Seldom do we ask the teachers for their opinion.

You should not ignore our advice under any circumstances.

• Under no circumstances should you ignore our advice.
• Under no circumstances shouldn't you ignore our advice.

I got to bed and the telephone rang.

• Hardly had I got into bed when the telephone rang.
• Hardly had got I into bed when the telephone rang.

The girl was so beautiful that nobody could talk of anything else

• So beautiful was the girl that nobody could talk of anything else.
• Beautiful so was the girl that nobody could talk of anything else.

If we had arrived sooner, we could have prevented this tragedy!

• Had we arrived sooner, we could have prevented this tragedy!
• Had we if arrived sooner, we could have prevented this tragedy!

The student is both enthusiastic and knowledgeable.

• Not only is the student enthusiastic, but he is also kowledgeable.
• Not only is the student enthusiastic, but is he also kowledgeable.

Rachel did not know that her life was about to change.

• Little did Rachel not know that her life was about to change.
• Little did Rachel know that her life was about to change.

You shouldn't leave any child alone under any circumstances. 

• Under no circumstances shouldn't you leave any child alone.
• Unedr no circumstances should you leave any child alone.

The problem is so difficult that we need an expert to solve it.

• So difficult is the problem that we need an expert to solve it.
• So difficult the problem is that we need an expert to solve it.

As soon as she opened the front door, he handed her the two dozen roses.

• No sooner she opened the the front door, did he hand her the two dozen roses.
• No sooner did she open the front door, than he handed her the two dozen roses.