eleven + plural noun
eleven 直接修饰可数名词复数，名词用复数，eleven 本身不变。
The team needs eleven players.
这支球队需要十一名球员。
足球队；板球队；由十一名球员组成的板球队,因此第一十一人是最佳板球队,第二十一人是“B”队等；十加一的基数；由十一名球员组成的足球队；首发阵容
the number 11; one more than ten
由十一名球员组成的板球队,因此第一十一人是最佳板球队,第二十一人是“B”队等
A cricket team of eleven players. Hence first eleven - the team of best cricket players (at a school), second eleven - the "B" team, etc.
十加一的基数
the cardinal number that is the sum of ten and one
由十一名球员组成的足球队；首发阵容
A football team of eleven players; the starting lineup.
踢足球的队伍
a team that plays football
The school's first eleven won the match yesterday.
学校的一队昨天赢了比赛。
用法提示：此处 eleven 是名词，指十一人组成的球队（first eleven 指最佳阵容）。
He made the national football eleven last month.
上个月他入选了国家足球队。
用法提示：此处 eleven 是名词，指十一人组成的足球队。
Our cricket eleven plays at the park every Saturday.
我们的板球队每周六在公园比赛。
用法提示：此处 eleven 是名词，指十一人组成的板球队。
eleven 直接修饰可数名词复数，名词用复数，eleven 本身不变。
The team needs eleven players.
这支球队需要十一名球员。
表示特定群体中的十一个，of 后接限定词（如 the, these, my）加复数名词或代词。
Eleven of the students passed the exam.
这些学生中的十一名通过了考试。
定冠词 the 加 eleven 可指由十一名球员组成的球队（如板球队或足球队）。
The eleven took the field.
这支十一人球队上场了。
eleven 作主语时，谓语动词通常用单数。
Eleven is the sum of ten and one.
十一是十加一的和。
grammar · medium
易错句子He is the eleven player on the list.
正确表达He is the eleventh player on the list.
表示顺序、名次时要用序数词：eleven 的序数词是 eleventh（第十一）。中文"第十一名"里的"第"就是顺序标记，英语必须换成 -th 形式，不能用基数词 eleven。
grammar · medium
易错句子Eleven of students in my class are from Beijing.
正确表达Eleven of the students in my class are from Beijing.
"eleven of" 表示"……当中的十一个"，of 后面必须接特指的名词短语（the / these / my 等）或代词，如 eleven of the students、eleven of them；泛指一群人时不加 of，直接说 eleven students。
grammar · medium
易错句子My little brother is eleven years.
正确表达My little brother is eleven years old.
英语表达年龄时，"数词 + years" 后面必须加 old，构成 eleven years old；只说 eleven years 会被理解成"十一年（时长）"。也可以直接用 He is eleven.
（学校或俱乐部的）最佳阵容；一队
He was picked for the school's first eleven.
他入选了学校一队。
（学校的）二队；B队
The second eleven plays its matches on Saturday mornings.
二队在周六上午比赛。
十一名球员
A football team needs eleven players on the field.
一支足球队场上需要十一名球员。
十一人组成的队伍
Cricket is played by a team of eleven.
板球由一支十一人的队伍进行比赛。
十一点钟
The meeting starts at eleven o'clock.
会议十一点钟开始。
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十一岁
Her son is eleven years old.
她的儿子十一岁了。