彼がひどく怒るのも当然だ。

he; him; his; boyfriend

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

cruel; heartless; hard; harsh; severe; violent; intense; strong; heavy; extreme; very bad; terrible; awful; excessive; exorbitant; unreasonable; outrageous; unfair; unjust

to get angry; to get mad; to tell someone off; to scold; to be angular; to be square

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

too; also; in addition; as well; (not) either (in a negative sentence); both A and B; A as well as B; neither A nor B (in a negative sentence); even; as much as; as many as; as far as; as long as; no less than; no fewer than; even if; even though; although; in spite of; further; more; again; another; the other

natural; as a matter of course; justified; deserved; reasonable

be; is; indicates past or completed action; indicates light imperative