fret about/over sth
about 和 over 均可，后接名词、代词或动名词。
She frets about her son's health.
她为儿子的健康发愁。
按品；按弦；侵蚀；磨损；啃蚀；使粗糙；搅动；使起涟漪；用交织图案装饰；使呈斑驳；捆扎；系
To be worried or anxious; to make someone worried or irritated.
烦恼或激怒；担忧
To chafe or irritate; to worry.
装饰或点缀,尤其是用交错或雕刻图案
To decorate or ornament, especially with an interlaced or interwoven pattern, or (architecture) with carving or relief (raised) work.
捆绑；系住
To bind, to tie, originally with a loop or ring.
使粗糙,搅动或扰乱；引起波纹
To make rough, to agitate or disturb; to cause to ripple.
在...上形成图案；使多样化
To form a pattern on; to variegate.
给(乐器)装上品格
# To fit frets on to (a musical instrument).
浪费,挥霍
In the form fret out: to squander, to waste.
用线锯切割,制作镂空雕刻
To cut through with a fretsaw, to create fretwork.
按下品格后的弦
To press down the string behind a fret.
啃咬；消耗,侵蚀
To gnaw; to consume, to eat away.
通过搅动或侵蚀河岸矿石进行开采
To mine by agitating or eating away at (ore in the bank of a river).
被激怒或烦恼；生气或恼火；因烦恼而发牢骚
To be chafed or irritated; to be angry or vexed; to utter peevish expressions through irritation or worry.
磨损；擦伤；磨破
To be worn away; to chafe; to fray.
焦虑；担心
To be anxious, to worry.
激动；恼怒；剧烈骚动
To be agitated; to rankle; to be in violent commotion.
进行二次发酵
To have secondary fermentation (fermentation occurring after the conversion of sugar to alcohol in beers and wine) take place.
一般现在时
She frets over small details.
她为小细节烦恼。
一般过去时
He fretted about the exam all night.
他整晚为考试烦恼。
现在进行时
The baby is fretting because he is hungry.
宝宝在闹，因为他饿了。
fret 是规则动词，但变位时需双写 t 再加 -ed 或 -ing。
Don't fret about the exam; you've studied hard.
别为考试烦恼；你已经努力学习了。
用法提示：动词fret表示‘烦恼、焦虑’，后接介词about引出担忧的对象。
The constant rubbing fretted the fabric, creating small holes.
持续的摩擦磨损了布料，造成了小洞。
用法提示：动词fret表示‘腐蚀、磨损’，直接接宾语the fabric。
She fretted over her son's safety while he was traveling alone.
儿子独自旅行时，她为他的安全感到焦虑。
用法提示：动词fret表示‘焦虑’，后接介词over引出担忧对象，过去式fretted。
about 和 over 均可，后接名词、代词或动名词。
She frets about her son's health.
她为儿子的健康发愁。
that 从句说明担忧的具体内容，that 常可省略。
He fretted that he might lose his job.
他担心自己可能会丢掉工作。
此结构中 fret 为及物动词，表示使某人烦恼；常用 it 作形式主语。
It frets me that she never answers my calls.
她从不接我电话，这让我很烦恼。
最常用、最直接的同义词；worry 强调持续的担忧，fret 则多一层烦躁不安、坐立难安的意味。
口语常用，强调为不大重要的事过分紧张、烦躁，常含有“不必如此”的评价。
语气比 fret 重得多，强调长时间在内心反复挣扎、煎熬，常接 over/about。
侧重沉默、郁郁寡欢地反复想一件事，不一定有外在的烦躁；常接 over/on/about。
非正式表达，指独自烦躁、内心煎熬，常接 over/about；比 fret 更口语化。
grammar · medium
易错句子She fretted her son's health all night.
正确表达She fretted about her son's health all night.
fret 表示"为……担忧"时是不及物动词，必须用介词 about 或 over 引出担忧的对象，不能像汉语"担心某事"那样直接带宾语；若直接加宾语，会被理解为另一个义项"使……烦恼"，句子意思不通。
grammar · medium
易错句子I am very fret about the interview tomorrow.
正确表达I am very worried about the interview tomorrow.
fret 是动词，不能放在 be 动词后作表语来形容人的情绪状态；汉语"我很烦恼／担心"对应的是形容词 worried，或者改用动词，说 I fret about the interview tomorrow。
grammar · medium
易错句子He freted about the exam results for days.
正确表达He fretted about the exam results for days.
fret 是重读闭音节，且以单个辅音字母 t 结尾，加 -ed 或 -ing 时须双写 t，写成 fretted、fretting；规则地只加 -ed 得出的 freted 拼写错误。
针对 fret 作动词‘使担忧/使烦恼’义；calm 侧重使情绪安定，fret 侧重焦虑不安，不涉及‘琴品、侵蚀’等义。
针对 fret 作动词‘使担忧/使烦恼’义；comfort 侧重以言辞或行动减轻痛苦，fret 侧重独自烦忧，二者不能任意互换。
针对 fret 作动词‘使担忧’义；reassure 侧重通过保证打消疑虑，fret 则常指无谓的担忧，语境上有限定。
针对 fret 作动词‘使烦恼’义；soothe 侧重使情绪或疼痛缓和，fret 侧重因小事烦躁，soothe 还可用于身体不适，fret 无此用法。
针对 fret 作动词‘使恼怒’义；please 表示使人愉快，fret 表示使人恼火，二者互为反义；不适用于 fret 的‘担忧’义。
为…担心；忧虑
Don't fret about the test; you've studied hard.
别为考试担心，你一直很努力。
担心…；忧虑…
She fretted that she might miss the deadline.
她担心自己可能错过截止日期。
别担心；不要烦恼
Don't fret, we have plenty of time.
别担心，我们时间充裕。
烦躁不安；又气又急
He fretted and fumed while waiting for the news.
他在等待消息时又气又急。
常与乐器演奏相关，fret 在吉他等弦乐器上指品格或按弦。
fret 涉及按压琴弦，string 是弹奏时的直接对象。
fret 安装在指板上，演奏时手指在指板上的品格间移动。
指板位于琴颈上，fret 分布在琴颈表面。
按弦（fret）是弹奏出和弦或单音的必要动作。
焦急不安，又气又恼
She fretted and fumed about being stuck in traffic.
她被堵在路上，又着急又恼火。
别担心，不必忧虑
Fret not; the results will come soon.
别担心，结果很快就会出来。
无事烦恼，瞎担心
He's fretting over nothing; the payment already went through.
他是在瞎担心，付款早已到账了。
不要因作恶的人心怀不平。
Don't fret about the mistakes you've made; learn from them.
不要为你已经犯的错误烦恼，从中学习就好。
Choose the next layer that will help you use fret with more confidence.
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Dictionary facts from ECDICT, WIKTIONARY, WORDNET.