When Horace writes-- Ridiculum acri Fortius et melius magnas plerumque secat res, he means that men are more likely to be made better by the fear of contempt than of moral reprobation.
Omnibu' cura viris uter esset induperator, and in the epithet which Cicero quotes as applied to cities-- Urbes magnas atque imperiosas.
Magnas inter opes inops=--Poor in the midst 20 of great wealth.
Ridiculum acri / Fortius ac melius magnas plerumque secat res=--Ridicule often settles matters of importance better and more effectually than severity.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "magnas" in a variety of sentences. We hope that you will now be able to make sentences using this word.