as the object form of the pronoun ‘they': 用作代词they的宾格形式:I saw them. 我看见他们了。
after the verb ‘to be': 用在动词to be的后面:I'm sure it was them. 我肯定那是他们。
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used for referring to a particular group of people or things when they have already been mentioned or when it is obvious which group you are referring to 他们;她们;它们
mainly spokenused instead of ‘him or her', especially when you are referring back to a word such as ‘everyone', ‘someone', or ‘anyone' (用于代替him or her,尤用于回指everyone, someone或anyone等词时)他或她,大家,人们
Someone phoned, but I told them to call back later. 有人打电话来,我叫他晚些时候再打过来。
In spoken English it is normal to use object pronouns such as me, him, her, or them after ‘as' or ‘than': 在英语口语中, as或than的后面通常用代词的宾格形式,如me, him, her或them:I can't run as fast as them.我无法像他们跑得那样快。Henry's older than me. 亨利年纪比我大。 A subject pronoun such as I, he, she, or they is rarely used by itself after ‘as' or ‘than', except in very formal English: 除非在非常正式的英语中, as或than的后面很少单独使用代词的主格形式如I, he, she或they:Henry is taller than I.亨利比我高。
Object pronouns are also normally used after the verb ‘to be' in spoken English: 在英语口语中,代词的宾格形式通常也用于动词to be之后:‘Who's there?' ‘It's me.'“谁在那儿?”“是我。”I knew it was him 我知道是他。 有些人认为to be后面用代词的主格形式更正确,但这种用法听起来非常正式而且已经过时:. Some people think it is more correct to use subject pronouns after ‘to be', but this sounds very formal and old-fashioned: It is I.是我。I knew it was he.我知道是他。
In writing, subject pronouns are more often used after the verb ‘to be', especially if there is a following relative clause: 在书面语中,尤其是后接关系从句时, to be后更常用代词的主格形式:It was he who first suggested the idea.是他首先提出了这种观点。