还

还 has two readings that must be kept separate. As huán, it is a verb meaning "to return, to give back" — 还书 huán shū (to return a book), 还钱 huán qián (to pay back money), 还愿 huán yuàn (to fulfill a vow). As hái, it is an adverb with four major uses in modern Mandarin. This entry covers hái exclusively.

The four uses of hái look unrelated on the surface: "still" (he's still sleeping), "also" (I can also speak Japanese), "even more" (today is even colder), and the 还是 constructions. The unifying logic is extension past a boundary. Time boundaries: the situation has lasted longer than expected. Scope boundaries: something additional falls inside the domain. Degree boundaries: the level exceeds the comparison point. Once this thread is visible, the four uses stop feeling arbitrary.

Both 还 hái and 也 yě translate as "also," but they operate at different structural levels. 也 matches predicates across subjects: A does X; B also does X. 还 adds a new predicate to the same subject: A does X and also Y. When you hear 还 in the additive sense, something new is being stacked onto what was already said about the same person or thing — the scope extends further than before.

In practice: 他也去 (he's also going, like the others) vs. 他还去图书馆 (he's going to the library in addition to whatever else he's doing). The distinction becomes important in sentences like 她不但聪明，还很努力 — the 还 adds a second quality to the same subject after 不但 has established the first. Swapping 也 in here would be grammatically odd.

还是 háishì operates in three distinct contexts that look unrelated until you see the pattern. In alternative questions, it presents two options and asks the listener to choose between them. As advice, it signals that after considering alternatives, one course of action remains the most sensible. In expressions of resignation like 还是算了, it signals that continuing to pursue something is no longer worth it — the speaker has weighed the options and settled on withdrawal.

All three uses share the idea of deliberation between possibilities: one path remains, or is determined to be, the appropriate one. Compare with 或者 huòzhě (or), which is used in statements, not questions — 你可以喝茶或者咖啡 (you can have tea or coffee) vs. 你要喝茶还是咖啡？(do you want tea or coffee?). 还是 in questions is not interchangeable with 或者.

Three expressions built on 还 form a cluster that learners encounter within their first weeks but rarely see explained together: 还好 hái hǎo, 还行 hái xíng, and 还可以 hái kěyǐ. All three mean roughly "passable, acceptable, not bad" — an assessment that sits somewhere between genuine praise and polite dismissal. The common thread is 还 as a boundary marker: the quality clears the minimum bar, but only just, or at any rate better than the alternative would have been.

还好 carries a secondary meaning that the others lack: "fortunately" or "luckily." 还好你来了 means "it's a good thing you came" rather than "you came in an acceptable fashion." Context disambiguates easily. The fortunate-that sense appears when 还好 opens a clause about an outcome that could have been worse.

Chinese offers three adverbs for the continuative "still," each calibrated to a different register. 还 hái is the everyday spoken form — the one you hear in conversation, in texts, and in informal writing. 仍然 réngrán appears in news reports, formal prose, and official documents; it is never marked as too formal for writing, but it would sound stilted in casual speech. 依然 yīrán is literary and often carries emotional weight — the sense that something persists despite the passage of time, loss, or change. 依然爱你 ("I still love you") reads as touching precisely because 依然 pulls from a more elevated register than 还. Using 还 in the same sentence would flatten it.

The three are largely interchangeable in meaning, but choosing the wrong register for the context is noticeable. A news article that writes 他还担任总裁职务 ("he is still serving as CEO") sounds chatty. Lyrics that use 仍然 instead of 依然 lose the patina. 还 is safe for all spoken contexts; the other two require matching the register of the surrounding text.