彼は仕事の後に元気がない

彼: he, his, him, boyfriend
は: a, the, is, am, are, will
仕事: work, job, task, employment, occupation
の: to, of
後: after, later, behind, afterward, afterwards, rear, in the future, aback, remainder
に: in, to, on, at, into, upon
元気: fine, energetic, energy, good, spirit, healthy, courage, robust, vitality, vigor, pep
が: is, there, but, ga, will, however
ない: no, not, don't, without, missing, absent