There is there are is there are there?

There is and there are means something exists.

There is singular

Use "there is" (there's) for a noun - singular.

Example: There is a mouse in the bag.

There are plural

Use "there is" (there's) for a noun - plural.

Example: There are four girls in a team.

Place there is and there are at the start of a sentence.

there's -  contraction

The contraction of there is is there's. There is no short form for there are!

Questions there is / there are

Statement: There is a book on the table.
Question:  Is there a book on the table?

Statement: There are books on the table.
Question:  Are there books on the table?