Right, this is really what this forum is for:
I'm going to write in Sindarin about Greenwood the Great. It will probably take me months!! But I'm going to do it here, adding to it day by day (or week by week) as I have time, so that others can help me, correct me, explain things to me as I go along.
And when I get stuck, I can put up a shout for help, or ask a stupid question without worrying about the response.
Why Greenwood the Great? Because I think its history has lots of interest, there is plenty of scope for descriptive writing, and most importantly its what the vocabulary we have lends itself to best!!
So here is my first beginning:
Ned idhrinn ioer en-giliath, pen Anor egor Ithil, *oler i thoer dynd galadhremmin , i Ivon nauthant ed ind în a thangant mi 'law e-galarad :: I ñelaidh heriasser galo, tobol Ennorath na ylf ar 'olassath dîn.
Ablui aind Morgoth Bauglir udul ed Angband în i agor. Na goth a iaew udunc amarth vinui an Ennorath. I Melain úgaranter gartho i thaen ar 'alarad dennin.
Breged i vuil dobant a i 'orf en ñelaidh nuithannen.
In the ancient Ages of the stars, without Sun or Moon, grew the tall tree-entangled forests, that Yavanna conceived out of her mind and established in the light of the Two Lamps. The trees began vigorously to grow, roofing over the lands of Middle-Earth with their branches and foliage.
After long times The Dark Enemy and Tyrant came out of his Iron Prison which he had made. With enmity and mocking scorn he brought the first doom on Middle-Earth. The Valar were not able to defend the summits and the lamps were felled.
Suddenly the twilight fell and the vigour of the trees was stopped.