adverb, noun, verb, adjective, expression · really; truly; indeed

你真的要去吗？

adjective, expression, adverb, verb · real; true; genuine; authentic

这是一颗真的钻石。

adjective, adverb, noun · referring to whether something is factual, authentic, or really the case.

他告诉我他要出国，这是真的吗？

adverb, adjective · proper (mathematics), used to describe subsets or fractions

数学老师强调，真子集才是原集合真的子集。