Inversion

Inversion involves swapping (inverting) the position of an auxiliary verb and subject in a sentence. The most common use of inversion is forming interrogative sentences (questions).

• Earth is small compared to ther planets ---> Is Earth small compared to other planets?
• I'm having a bath --> Are you having a bath?

• My name is Mark ---> Is your name Mark?

   

If there is no auxiliary verb in the sentence, one needs to be added when you invert the word order.

• She looked tired ---->Did she look tired?

• Andrew had problems with health --> Did Andrew have problems with health?
• It belongs to Emma --> Does it belong to Emma?

Inversion is also used in emphasizing and in conditional sentences.