[[4-31]] tendrá, 'must have.' This is the future of probability or conjecture.
5.—[[5-1]] como no sean, 'unless it be.'
[[5-16]] ¿sería? 'could... be?': conditional of probability or conjecture.
[[5-21]] al hablar, 'when speaking.' Note that Spanish al+infin.=English 'upon' or 'when'+pres. part.
[[5-22]] debería, 'should.'
[[5-24]] al que, 'the one who.'
6.—[[6-8]] Aquel que, 'that one who.'
[[6-13]] Es que, 'the fact is that.'—veces: see vez. Note that a word ending in z forms its plural in -ces.
[[6-15]] has de saber, 'you are to' (or 'must) know.'
[[6-18]] lucha is subject.