Help writing a poem

I know it's extremely lame to ask for help on homework, but we're in the poetry unit, and I cannot for the life of me come up with a decent poem that has the rhyme sheme a, a, b, a. We're supposed to make it like Robert Frost's Stopping by Woods on a Snowy Evening. If anyone could help me, that'd be great.

In case someone doesn't know what I'm talking about with the a, a, b, a stuff...

Whose woods these are I think I know.
His house is in the village, though
He will not see my stopping here
To watch his woods fill up with snow.

Thanks!

Yeah, so do I. Unfortunately, I have trouble trying to write in his poetic style.