nod at sb
at 后面接点头示意的对象，表示向某人点头。
She nodded at me and smiled.
她朝我点了点头，笑了笑。
点头（打招呼）；打瞌睡；打盹；（物体）上下晃动；摇摆；（用头）顶球；暗指；影射
to move your head up and down, especially to show agreement or to give a sign
上下点头以示同意
To incline the head up and down, as to indicate agreement.
点头致意
To briefly incline the head downwards as a cursory greeting.
摆动,上下移动
To sway, move up and down.
逐渐入睡
To gradually fall asleep.
以点头表示
To signify by a nod.
因一时疏忽或疲劳而犯错
To make a mistake by being temporarily inattentive or tired
用头顶球
To head; to strike the ball with one's head.
暗指某事
To allude to something.
一般现在时
She nods when she agrees.
她同意时会点头。
一般过去时
He nodded at me yesterday.
他昨天朝我点了点头。
现在进行时
She is nodding to the music.
她正随着音乐点头。
规则动词，但重读闭音节结尾，需双写 d 再加 -ed 或 -ing。
She nodded when I asked whether she understood the rules.
我问她是否明白规则时，她点了点头。
用法提示：nod 的过去式 nodded 作动词，表示用点头的动作表达明白或同意。
He usually nods to show that he agrees with the plan.
他通常点点头，表示自己同意这个计划。
用法提示：nods 是动词 nod 的第三人称单数形式，表示以点头示意同意。
The audience kept nodding as the speaker explained each step.
演讲者讲解每一步时，观众不停地点头。
用法提示：nodding 是 nod 的现在分词，与 kept 连用，表示不停地点头表示认同。
at 后面接点头示意的对象，表示向某人点头。
She nodded at me and smiled.
她朝我点了点头，笑了笑。
nod 可作及物动词，后接 head 作宾语。
He nodded his head in agreement.
他点头表示同意。
不定式短语说明点头的目的。
She nodded to show that she understood.
她点头表示自己明白了。
nod off 是短语动词，意为打瞌睡、睡着。
I nodded off during the film.
我看电影时打起了瞌睡。
grammar · medium
易错句子He noded his head in agreement.
正确表达He nodded his head in agreement.
nod 是重读闭音节（一个元音字母 o 后跟一个辅音字母 d 结尾），加 -ed、-ing 时要双写末尾辅音字母，所以过去式和过去分词是 nodded，现在分词是 nodding，不能写成 noded、noding。
grammar · medium
易错句子She nodded head to show she agreed.
正确表达She nodded her head to show she agreed.
英语中提及身体部位时，习惯在名词前加物主代词（my/your/his/her 等），所以要说 nod one's head；中文“点头”不需要这类限定词，因此容易漏掉 her/his。
grammar · medium
易错句子The teacher nodded me when I walked in.
正确表达The teacher nodded to me when I walked in.
表示“向某人点头”时，nod 是不及物动词，要借介词 to 或 at 引出点头的对象，不能直接接人称宾语；中文“向我点头”没有介词，容易直接写成 nod me。
点头表示同意
She nodded in agreement when I suggested the idea.
我提出这个想法时，她点头表示同意。
点头
He nodded his head slowly and said nothing.
他慢慢地点了点头，什么也没说。
打瞌睡，打盹
I nodded off on the sofa while watching TV.
我看电视时在沙发上打起了瞌睡。
向某人点头（示意）
She nodded at me from across the room.
她从房间另一头向我点头示意。
点头表示赞许
The teacher nodded in approval at my answer.
老师对我的回答点头表示赞许。
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