1
fasten sth (to/onto sth)
用to或onto表示固定到某物上。
She fastened the brooch to her dress.
她把胸针别在连衣裙上。
系紧，扣牢
fastens — third person singular of fasten
先理解核心含义，再看它在真实句子里的用法。
系紧，扣牢
to close or attach something firmly
She fastened the brooch to her dress.
她把胸针别在连衣裙上。
牢固地系住或连接。
To attach or connect in a secure manner.
使产生密切效果；使起作用；使落地。
To cause to take close effect; to make to tell; to land.
fasten
Base
原形
fastens
3rd person
第三人称单数
fastening
-ing
现在分词
fastened
Past
过去式
fastened
Past participle
过去分词
She fastens the lock.
她锁好锁。
She fastens her seatbelt before driving.
她开车前系好安全带。
He fastened the hook to the wall with a screw.
他用螺丝把钩子固定在墙上。
I am fastening my necklace, but the clasp is tricky.
我正在扣项链，但搭扣很难扣。
用to或onto表示固定到某物上。
She fastened the brooch to her dress.
她把胸针别在连衣裙上。
用together表示连接两个部分。
He fastened the two pieces of wood together with glue.
他用胶水把两块木头粘在一起。
用with表示使用的工具或材料。
Fasten the envelope with tape.
用胶带封好信封。
不及物用法，表示以某种方式扣紧。
This jacket fastens at the front.
这件夹克在前面扣紧。
Not this
Please tie your seatbelt before driving.
Use this
Please fasten your seatbelt before driving.
中文学习者经常混淆'tie'和'fasten'，'tie'用于绑结（如鞋带），而'fasten'用于扣紧安全带或纽扣。应使用'fasten'。
Not this
Please fasten on your seatbelt before driving.
Use this
Please fasten your seatbelt before driving.
中文表达'系上安全带'中的'上'易导致添加介词'on'，但英语中'fasten'是及物动词，直接跟宾语，不需要介词'on'。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
系好安全带
Please fasten your seatbelt before takeoff.
起飞前请系好安全带。
牢固地系紧
Make sure to fasten the rope securely.
确保把绳子系牢。
固定在...上
Fasten the shelf to the wall with screws.
用螺丝将架子固定在墙上。
用...系紧
Fasten the bag with a zipper.
用拉链把包拉好。
扣上扣子
He fastened the buckle of his belt.
他扣上了腰带扣。
系好安全带
Please fasten your seatbelt before takeoff.
起飞前请系好安全带。
抓住；盯住
The media fastened on the scandal.
媒体紧抓住这桩丑闻不放。
盯着...看
She fastened her eyes on the painting.
她目不转睛地盯着那幅画。
系好安全带，今晚会很颠簸！
She fastened her seatbelt as the turbulence began.
她系好了安全带，因为开始有气流了。
系好安全带，多萝西，因为堪萨斯要消失了。
He told her to fasten her seatbelt before the unexpected turn.
他让她在意外转弯前系好安全带。
Use fastens naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：fasten 就像 'fast'（快的）+ 'en'，快速固定住，比如系安全带。
语域中性，常用于日常生活中的固定物品，如系安全带、扣纽扣、拴紧绳索等。
All words share the spelling chunk 'sten' and a silent 't', but vowel sounds differ. Listen, glisten, and christen rhyme with each other (vowel /ɪ/). Hasten and chasten rhyme (vowel /eɪ/). Moisten has /ɔɪ/. None rhyme with 'fasten' (vowel /æ/ or /ɑː/).
Dictionary facts from ECDICT, WIKTIONARY.