这几个词都具有“也”、“同样地”、“还”的意思。但在句中的用法不尽相同。现浅析如下: 一、also(adv.)多用于书面语和较正式场合。通常与动词连用,修饰句子里主语后面的部分。它在句中一般位于be动词和助动词之后,行为动词之前。但当它在句中作状语时,放在句首,后面用一个逗号;当用作强调时,放句尾;also有时用作连词相当于and also。例如: All these words have the meaning of “also”, “same”, “return”. However, the usage in the sentence is not the same. Now it is analyzed as follows: First, also (adv.) is mostly used in written language and more formal occasions. Usually used in conjunction with verbs to modify the part of the sentence that follows the subject. It is generally located in the sentence after the be verb and auxiliary verb, before the action verb. But when it is used as an adverb in a sentence, it is placed at the beginning of the sentence, followed by a comma; when used as an emphasis, the end of the sentence is set; also sometimes used as a conjunction for and also. E.g: