Paired conjunctions for argument and condition
Mandarin connects clauses using PAIRED conjunctions — the first half sets up, the second half delivers. 不仅...而且 (not only...but also), 否则 / 不然 (otherwise), 即使...也 (even if), 只要...就 (as long as), 只有...才 (only if), 无论 / 不管...都 (no matter what/who/how), 反正 (anyway). Two patterns to learn: (1) most pairs split across two clauses with the second-half adverb (而且 / 也 / 就 / 才 / 都) sitting RIGHT BEFORE the verb in the second clause. (2) 否则 / 不然 / 反正 are single-word connectors that sit at the start of their clause. Once the pairs are memorized, your spoken Mandarin will sound markedly more sophisticated and your arguments will land.
不仅...而且 / 不但...还 — not only...but also
不仅...而且 bùjǐn...érqiě and 不但...还 búdàn...hái are near-synonyms for 'not only X but also Y'. 不仅 / 不但 sit at the start of clause 1; 而且 / 还 introduce clause 2. 他不仅会说中文,而且会说日文。 = He not only speaks Chinese, but also Japanese. 她不但漂亮,还很聪明。 = She's not only beautiful but also smart. The two halves can share or change subjects: 不仅小李去了,小王也去了。 = Not only did Xiao Li go, Xiao Wang went too (subject changes; second clause uses 也). When subjects DIFFER, 而且 clause typically uses 也 to mark the additional party. Also: 不但不...反而... fǎn'ér = 'not only didn't X, but on the contrary Y': 他不但不感谢我,反而生气了。 = He not only didn't thank me, but actually got angry. The flow runs: setup with 不仅 / 不但 → escalation with 而且 / 还 → contrast with 反而.
否则 / 不然 — otherwise
否则 fǒuzé and 不然 bùrán both mean 'otherwise / or else'. They sit at the START of the second clause — the first clause states a precondition, the second clause states the unwanted consequence if the precondition isn't met. 你得快点儿,否则要迟到了。 = You have to hurry, otherwise you'll be late. 多穿点儿衣服,不然会感冒。 = Put on more clothes, or else you'll catch a cold. 否则 is slightly more formal / written; 不然 is the conversational default. They're freely interchangeable. The second clause often uses 要 / 会 / 就 for the predicted bad outcome. 不然 also stands alone as 'otherwise / or': 不然这样吧 = how about this instead. Note the structural difference from English: Mandarin attaches 否则 / 不然 at the START of the consequence clause; English usually puts 'otherwise' at the start too, so the order matches well.
即使...也 / 就算...也 — even if
即使...也 jíshǐ...yě = 'even if'. Hypothetical concession — the speaker grants a hypothetical and asserts the consequence holds anyway. 即使下雨,我也去。 = Even if it rains, I'll still go. 即使你很忙,也得吃饭。 = Even if you're busy, you have to eat. The pattern is 即使 + hypothetical + , + subject + 也 + V. The 也 is non-negotiable — it sits before the verb in the second clause. 就算...也 jiùsuàn is the conversational equivalent: 就算下雨,我也去。 = Same meaning, more colloquial. 即使 is slightly more written; 就算 is what you'd say to friends. Compare to 如果 (lesson 25 = if) — 如果 is plain conditional, while 即使 is concessive ('even if X, Y still holds'). 即使 signals that the speaker considers X unlikely or unfavorable but stands by Y regardless.
只要...就 — as long as / only need
只要...就 zhǐyào...jiù = 'as long as / so long as'. Marks a SUFFICIENT condition — if X, then Y guaranteed. 只要你来,我就高兴。 = As long as you come, I'll be happy. 只要他帮我,这件事就容易。 = As long as he helps me, this'll be easy. The 就 sits BEFORE the verb in the second clause. 只要 clauses can also imply 'all you need to do is X': 只要努力,就能成功。 = As long as you try hard, you can succeed. The flavor is positive — X is enough to guarantee Y. Contrast with 只有...才 (next section), which is restrictive — Y happens ONLY if X. 只要 = sufficient (X is enough); 只有 = necessary (only X works). Don't mix the conjunctions and adverbs: 只要...才 is wrong; 只有...就 is wrong.
只有...才 — only if / only by
只有...才 zhǐyǒu...cái = 'only if / only by'. Marks a NECESSARY condition — Y happens ONLY when X. 只有努力,才能成功。 = Only by trying hard can you succeed (= only if you try hard, can you succeed). 只有他来,我才去。 = Only if he comes will I go. The 才 sits BEFORE the verb in the second clause. 才 here carries restrictive 'only then' — distinct from 才 = just (recently). The flavor is restrictive / exclusive: nothing else suffices. Compare again: 只要他帮我,我就去。 = If he helps, I'll go (his help is enough; I might also go alone). 只有他帮我,我才去。 = Only if he helps will I go (without him, I won't). English 'only if' translates to 只有...才; English 'as long as' translates to 只要...就. The choice changes the logic, so listen carefully when natives use them.
无论 / 不管...都 — no matter what / who / how
无论...都 wúlùn and 不管...都 bùguǎn are near-synonyms = 'no matter / regardless of'. They take a question word or alternative phrase, then 都 before the verb in the main clause. 无论谁来,我都欢迎。 = No matter who comes, I welcome them. 不管多忙,我都要去。 = No matter how busy, I'll go. 不管你说什么,我都不去。 = No matter what you say, I won't go. 无论A还是B = whether A or B: 无论你去还是不去,我都去。 = Whether you go or not, I'll go. 无论 is slightly more written; 不管 is colloquial. Both pair obligatorily with 都 (or sometimes 也) in the main clause. The pattern: 无论 / 不管 + question-word phrase + ,+ subject + 都 + V. The question word inside (谁, 什么, 怎么, 多 + Adj) generalizes the variable being conceded.
反正 — anyway / in any case
反正 fǎnzhèng = 'anyway, in any case, regardless'. A discourse marker — it dismisses alternatives and asserts the speaker's resolved stance. 反正我不去。 = I'm not going, anyway. 反正你不会听我的。 = You won't listen to me anyway. 反正天气也不好,在家吧。 = The weather's not great anyway, let's stay home. 反正 sits at the start of the clause it modifies, often at the start of a sentence. It pairs naturally with 都 / 也 / 就: 反正都一样。 = It's all the same anyway. 反正都要去 = (we) have to go anyway. The English equivalent 'anyway' has the same dismissive quality. 反正 signals: 'don't bother arguing; the result is settled'. In conversation, 反正 is extremely common as a way to wrap up an argument or accept an outcome.
