Ft. Lauderdale, Fl USA
Meter can certainly change, as can the number of syllables in a line....as long as they are consistent. As a general rule, rhyming lines should follow the same patterns. For example:
i WENT to SEE my BUD-dy
LIV-ing DOWN the STREET
i FLAGGED a PAS-sing TAX-i
SAV-ing MY poor FEET.
The rhyming lines 1 and 3 are iambic, with 7 syllables. The rhyming lines 2 and 4 are trochaic with 5 syllables. The meter is preserved. This is just something you will have to practice on. There are some thoughts that simply do not do well with structured forms, in which case free verse is the better way to go. SOme are greatly enhanced by using structure. Only you can decide which is best for your poem.
When Nan says post away, she doesn't really mean post away! Look at the assignments and feel free to add to them with poems you want a critique on. Do not simply post poems that are not attached to an assignment. If you go back through the history of this workshop, you will find many areas covered dealing with rhyme, structure, flow, etc. Find a topic that you feel you need work on and submit a poem on that thread. I will then help you out with it.