急!!! Inversion用法 40分

I eat an apple.
An apple is eaten by me.

I seldom eat apples.
Seldom do I eat apples.

The boss has seldom been so upset.
Seldom has the boss been so upset.

I have never been so excited.
Never have I been so excited.

--------To anonymous person without a name,comes accurate and gets20-40?------------------Inversion means a changing position or order of some sentences to its opposite,or of turning sentences upside down:inversion of normal word order(=opposite order)eg Place a plate over the cake tin and invert its cake!
Usually transitive verbs can take different types of object--as a noun,a phrase, a clause which can combine with different preposition or verb.Take care the sentences have been inverted:-
An apple is eaten-----
Apples were seldom eaten---------
So upset had been my boss-------------
Never have I been so excited,elated,euphoric,exhilarated that......................