There is/ There are

Study this structure in this web page.

http://www.theyellowpencil.com/gramahay.html

And now some practice...

http://www.theyellowpencil.com/tothere1.htm

http://www.theyellowpencil.com/tothere2.htm

http://www.theyellowpencil.com/tothere4.htm