彼らは早く出発しなければならなかった

Meaning
they had to leave early

Vocab used in this sentence

he, his, him, boyfriend
la, ra, from, et al
a, the, is, am, are, will
早い
early, fast, quick, premature
出発
leave, depart, departure, leaving, departures
and, shi, four, death
ない
no, not, don't, without, missing, absent
if, by, should, when
なる
be, get, become, comes, to become
ない
no, not, don't, without, missing, absent
the, was, ta, da, other

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