谈谈必须和必需、须要和需要、决不和绝不的使用。必须和必需“必须”表示事理上和情理上的必要,强调“一定要”;“必需”表示不可缺少,强调“一定要有”。前者是副词,多作状语;后者一般作动词,充当定语和谓语。如“必须尊重知识”,不能用“必需”;“所必需的条件”,不能用“必须”。须要和需要“须要”:一定要(语义和“必须”相近,但语气和缓,没有很强的命令性);“需要”:应该有,要求有,必须有。前者是助动词,不能独立作谓语;后者是动词,可带动词、形容词等作宾语。如“此事须 Talk about the necessity and need, the need and the need, never or never. Must and must “must” represent the necessary and necessary for the situation, emphasizing “must be”; “necessary” means indispensable, emphasizing “must have.” The former is an adverb, more than an adverbial; the latter is generally used as a verb, attributive and predicate. Such as “must respect knowledge”, can not use “necessary”; “necessary conditions”, can not use “must”. Needs and needs “needs”: must (semantics and “must” be similar, but the tone is gentle, there is no strong imperative); “need”: there should be, require, there must be. The former is an auxiliary verb, can not be used independently as a predicate; the latter is a verb, can be verbs, adjectives and other objects. Such as "the matter must be