Aeneid I 561-578

1a           First Main Clause Begins
2       Participial Phrase
1b First Main Clause Concludes
1c Second Main Clause Begins
1d Second Main Clause Concludes
1a Main Clause Begins
2a       Infinitive Phrase Begins
1b Main Clause Concludes
2b       Infinitive Phrase Continues
2c       Infinitive Phrase Concludes
1a Main Clause Begins (nesciat supplied from 1b)
1b Main Clause Concludes
1a Main Clause Begins
2a       Participial Phrase Begins
1b Main Clause Continues
2b       Participial Phrase Continues
1c Main Clause Concludes
2c       Participial Phrase Concludes
1a       Conditional Clause Begins (optātis supplied from 1b)
1b       Conditional Clause Concludes
2a Main Clause Begins (supply vōs)
2b Main Clause Concludes
1 Main Clause
1a First Main Clause Begins (Urbs changed to Urbem by attraction to quam in 2)
2       Relative Clause
1b First Main Clause Concludes
1c Second Main Clause
1d Third Main Clause
1a Main Clause Begins
2       Participial Phrase
1b Main Clause Concludes (adforet = adesset)
1a Main Clause Begins (certōs = certōs nūntiōs)
1b Main Clause Concludes
2       Conditional Clause