Here's a DACTYLIC PENTAMETER:
Vergilium vīdī tantum, neo amāra Tibullō
Tempus amīcitiae fāta dedēre meae.
The first line is supposed to a hexameter. Here's my attempt (unsuccessful) at scanning it:
Ver-gi-li / um vī / dī tan / tum ne-o / a-mā-ra / Ti-bul-lō
In the 5th foot, the "a" should be long but it is not. Where did I make a mistake? I'm not even going to the pentameter below, because I'm still stuck with the hexameter.