Discussion of 必须/必須 [bì xū] necessarily, (can be translated as) must, have to - Trainchinese

1 - In this post, we discuss 必需 and 必须. Please be aware that 必需 and 必须 are two different words. We cannot replace one with the other when using them. - 必须 adv. must, have to - 必需 v. be indispensable, be essential to or for... Please refer to the example sentences of 必需 and 必须. 2 - This post is about these two verbs: 必须 and 应该. What are their differences? Are they interchangeable, and if so, will it cause any change in the meaning of the sentence? - 应该 indicates that the speaker thinks doing something is correct, so we can say that 应该 is used to speak up one’s suggestion or opinion of something (Example 1a & 2a). Example 1a. 我们是邻居，应该互相帮助。 [phr] We are neighbors, (so) we should help each other. Example 2a. 你应该参观天安门广场。 [phr] You should visit the Tian'anmen Square. - 必须 means that something has to be done, this is the only choice, and there is no other way around it. It is used either when making an order (Example 4a), a decision (Example 3a) or when making a objective statement (Example 5). Example 3a. 我今天必须去上班。 [phr] Today I must go to work. Example 4a. 听着，你现在必须马上去看医生。 [phr] Listen, you must go to see the doctor right now! Example 5. 想减肥的话，必须要多运动。 [phr] You have to do more exercise if you want to lose weight. We can use 应该 to replace 必须 in Example 3 and 4, but then the sentence, originally an order, will be turned into a suggestion/ opinion (Example 3b and 4b). Example 3b. 我今天应该去上班。 [phr] Today I should go to work. Example 4b. 听着，你现在应该马上去看医生。 [phr] Listen, you should go to see the doctor right now! And vice versa: if we use 必须 instead of 应该, the sentence will take on the tone of an order (Example 2b). Example 2b. 你必须参观天安门广场。 [phr] You must visit the Tian'anmen Square. (There is no other choice for you but to visit the Tian’anmen Square. You must do this.) 3 - Are there any commonly used synonyms or antonyms for 必须 (bìxū)? 4 - How is 必须 (bìxū) used in a sentence? 5 - “必需”与“必须”的主要差别通过“需”和“须”体现出来。“需”可以组词“需要”，因此，“必需”比“必须”多“要”这一意义。

在本篇论述中，我们探讨‘必需’与‘必须’的差异。需注意，‘必需’与‘必须’为两个迥异的词汇，二者在使用过程中不可互换。‘必须’（adv.，相当于must，have to）表示一种强制性，意味着某事必须完成，别无他途。‘必需’（v.，相当于be indispensable，be essential to or for...）则强调某事物对于某一目的或情境的不可或缺性。请参阅‘必需’与‘必须’的例句。本文旨在阐述这两类动词：必须与应该。二者有何区别？它们是否可以互换使用，以及这种互换是否会导致句子意义的改变？‘应该’表明说话者认为做某事是正确的，因此‘应该’常用于表达对某事物的建议或观点（例如1a与2a）。例如1a：我们是邻居，理应相互扶持。[短语] We are neighbors, (so) we should help each other. 例如2a：你应参观天安门广场。[短语] You should visit the Tian'anmen Square. 而‘必须’则意味着某事必须完成，别无选择，它通常用于发布命令（例如4a）、作出决定（例如3a）或进行客观陈述（例如5）。例如3a：我今天必须去上班。[短语] Today I must go to work. 例如4a：听着，你现在必须立即去看医生。[短语] Listen, you must go to see the doctor right now! 例如5：若欲减肥，务必加强运动。[短语] You have to do more exercise if you want to lose weight. 我们可以用‘应该’来替换例子3和4中的‘必须’，但这样一来，原本的命令句将转变为建议或观点（例如3b和4b）。例如3b：我今天应该去上班。[短语] Today I should go to work. 例如4b：听着，你现在应该立即去看医生。[短语] Listen, you should go to see the doctor right now! 反之亦然：若使用‘必须’代替‘应该’，句子将带有命令的语气（例如2b）。例如2b：你必须参观天安门广场。[短语] You must visit the Tian'anmen Square. （你除了参观天安门广场别无选择，你必须要这样做。）关于‘必须’（bìxū）是否存在常用的同义词或反义词，以及‘必须’在句子中的用法，以下是进一步的探讨。‘必需’与‘必须’的主要差别体现在‘需’与‘须’的用法上。‘需’可以组成‘需要’一词，因此‘必需’相较于‘必须’多了一层‘要’的意义。