私が知る限り、彼はいいやつだ。

I; me; private affairs; personal matter; secrecy; selfishness

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

to be aware of; to know; to be conscious of; to cognize; to cognise; to notice; to feel; to understand; to comprehend; to grasp; to remember; to be acquainted with (a procedure); to experience; to go through; to learn; to be acquainted with (a person); to get to know; to concern

limit; limits; bounds; degree; extent; scope; as far as possible; as much as possible; to the best of one's ability; very much; unless (after neg. verb); the end; the last; as long as; only

he; him; his; boyfriend

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

good; excellent; fine; nice; pleasant; agreeable; sufficient (can be used to turn down an offer); ready; prepared; profitable (e.g. deal, business offer, etc.); beneficial; OK

fellow; guy; chap; thing; object; (derogatory or familiar) he; she; him; her

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