20 The Hebrew text has a perfect verbal form, but it should probably be emended to the participial form, which occurs in the last line of the verse. Note as well the use of participles in vv. 4–7 to describe what typically takes place in the natural world. The participle זוֹרֵחַ (zoreakh, “to rise”) emphasizes continual, durative, uninterrupted action (present universal use of participle): the sun is continually rising (and continually setting) day after day.
21 Heb “the sun goes.” The participle בָּא (ba’, “to go”) emphasizes continual, durative, uninterrupted action (present universal use of participle): the sun is continually rising and continually setting day after day. The repetition of בָּא in 1:4–5 creates a comparison between the relative futility of all human endeavor (“a generation comes and a generation goes [בָּא]”) with the relative futility of the action of the sun (“the sun rises and the sun goes” [i.e., “sets,” בָּא]).
22 Heb “hastens” or “pants.” The verb שָׁאַף (sha’af) has a three-fold range of meanings: (1) “to gasp; to pant,” (2) “to pant after; to long for,” and (3) “to hasten; to hurry” ( שׁאף; 983 I שָׁאַף). The related Aramaic root שׁוף means “to be thirsty; to be parched.” The Hebrew verb is used of “gasping” for breath, like a woman in the travail of childbirth (Isa 42:14); “panting” with eagerness or desire (Job 5:5; 7:2; 36:20; Ps 119:131; Jer 2:24) or “panting” with fatigue (Jer 14:6; Eccl 1:5). Here שָׁאַף personifies the sun, panting with fatigue, as it hastens to its destination ( 983 I שָׁאַף 1). The participle form depicts continual, uninterrupted, durative action (present universal use). Like the sun, man—for all his efforts—never really changes anything; all he accomplishes in his toil is to wear himself out.
23 The verb זוֹרֵחַ (zoreakh, “to rise”) is repeated in this verse to emphasize that the sun is locked into a never changing, ever repeating monotonous cycle: rising, setting, rising, setting.
24 The word “again” does not appear in Hebrew, but is supplied in the translation for clarity and smoothness.