HSK6: learn ten words at a time

必须 · bìxū

must; be required to

you你nǐto have to必须bì xūearly先xiānto buy tickets买票mǎi piào，again / then再zàito go in进去jìn qù。

nǐ bì xū xiān mǎi piào， zài jìn qù。

Here, 必须: must; be required to.

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不必 · búbì

do not have to; there is no need to

you你nǐneed not不必bù bìnow现在xiàn zàito reply回答huí dá，can / may可以kě yǐearly先xiān想一想xiǎng yī xiǎng。

nǐ bú bì xiàn zài huí dá， kě yǐ xiān xiǎng yī xiǎng。

Here, 不必: do not have to; there is no need to.

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必 · bì

certainly will; must, often in concise written expressions

to answer答应dā yìng(completed / change)了leother people别人bié rén(modifier / structural particle)的dematter事shì，我必wǒ bìto accomplish做到zuò dào。

dā ying le bié rén de shì， wǒ bì zuò dào。

Here, 必: certainly will; must, often in concise written expressions.

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必然 · bìrán

inevitable; certain to happen

价格上涨jià gé shàng zhǎngvariant of 并并bìngnot不bùinevitable必然bì ránto lead to导致dǎo zhìsales volume销量xiāo liàngto decline下降xià jiàng。

jià gé shàng zhǎng bìng bú bì rán dǎo zhì xiāo liàng xià jiàng。

Here, 必然: inevitable; certain to happen.

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必需 · bìxū

essential; needed for a purpose

必需 describes something essential or required. 必须 means must and normally goes before a verb; both sound bìxū.

水是shuǐ shì生活必需shēng huó bì xū(modifier / structural particle)的denatural resource (such as…资源zī yuán。

shuǐ shì shēng huó bì xū de zī yuán。

Here, 必需: essential; needed for a purpose.

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必要 · bìyào

necessary; needed in the situation

to set off出发chū fāfront前qián，to have / there is有yǒunecessary必要bì yào检查一下jiǎn chá yī xiàwar chariot (archaic)车chē。

chū fā qián， yǒu bì yào jiǎn chá yí xià chē。

Here, 必要: necessary; needed in the situation.

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必修 · bìxiū

compulsory; required as part of a course of study

必修课 is a required course; 选修课 is an elective. 修 here refers to studying a course, not repairing something.

这门zhè ménsubject课kèto be / is是shìwe / us我们wǒ menspecialty专业zhuān yè(modifier / structural particle)的derequired course必修课bì xiū kè。

zhè mén kè shì wǒ men zhuān yè de bì xiū kè。

Here, 必修: compulsory; required as part of a course of study.

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未必 · wèibì

not necessarily; not certain to be so

未必 means not necessarily or not certain. It weakens a claim rather than proving the opposite; 贵未必好 does not mean expensive things are always bad.

expensive贵guì(modifier / structural particle)的dething东西dōng xīnot necessarily未必wèi bì更好gèng hǎo。

guì de dōng xi wèi bì gèng hǎo。

Here, 未必: not necessarily; not certain to be so.

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