His family is large.
Kare no tokoro wa dai kazoku da.
he; him; his; boyfriend
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
place; spot; scene; site; address; district; area; locality; one's house; point; part; space; room; whereupon; as a result; about to; on the verge of; was just doing; was in the process of doing; have just done; just finished doing
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
family; members of a family
be; is; indicates past or completed action; indicates light imperative