26 Things: This is ___ & These are ___. (English Nouns)

These are things that I saw when I took a walk on June 6, 2009.

The Nouns
bulletin board, bench, ashtray, pond, tree, mailbox, statue, flowers, fire hydrant, mirror, post, gutter, pipe, moss, grate, guard rail, no smoking sign, stairs, hedge, gravel, bricks, barbershop, umbrella rack, light switch, fire extinguisher, door knob

The Sentence Patterns
This is ___.
- a/an + singular noun
- non-countable noun (such as gravel and moss)

These are ___.
- plural noun