There is a book on the table. There is a book on the table. There are two chairs in the office. There are two chairs in the office.
Incorrect: Correct: There is a book on the table is. There is a book on the table.
Past tense of “hay”
The past tense of “hay” is “había”. This verb doesn’t get conjugated either.
There was a book on the table. There was a book on the table.
There was a lot of people at the party. Were there a lot of people at the party.