Question

Teacher kept the books on the shelves rewrite the following sentence from plural to singular

Answer 1

The answer will be, “Teacher kept the book on the shelf.’

Here you need to convert all the plural words to their singular form.

Hence, books and shelves will be converted to a single book and one single shelf.

Since other words are already in the singular form, you don’t have to change them.  

Answer 2

Noun is a name of a person, place, thing.  

A singular noun names one person, place, thing, or idea, while a plural noun names more than one person, place, thing, or idea.  

So writing the sentence in plural noun will be “The child's feet and tooth are aching aching”