1
fasten sth to sth
He fastened the rope to the tree.
他把绳子系在树上。
系牢，系紧；(使)关紧
先理解核心含义，再看它在真实句子里的用法。
系牢，系紧；(使)关紧
past tense and past participle of fasten; to make something secure or closed
He fastened the rope to the tree.
他把绳子系在树上。
fasten的过去式和过去分词
(使两物)系牢( fasten的过去式和过去分词 ); 系紧; 使牢固; (使)关紧
imp. & p. p. of Fasten
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 her seatbelt before driving.
她开车前系好安全带。
He fastened the rope to the tree.
他把绳子系在树上。
They have fastened all the windows securely.
他们已经把所有窗户关紧了。
规则动词，过去式和过去分词同形，常与to/with连用。
She fastened the necklace around her neck.
她把项链系在脖子上。
The seatbelt was fastened securely across his lap.
安全带被牢牢地系在他的大腿上。
The lid of the jar fastened tightly after being screwed on.
罐子盖被拧紧后就关牢了。
He fastened the rope to the tree.
他把绳子系在树上。
She fastened the necklace with a clasp.
她用扣子把项链系好。
“fasten up”也可表示“扣紧”，但“up”常可省略。
He fastened his coat before going out.
他出门前系好了外套。
Not this
He fastened the rope on the tree.
Use this
He fastened the rope to the tree.
介词错误：表示‘系在…上’时，应用to，而非on。fasten常与to连用表示固定或系于某处，而on多表示‘在…之上’，不表示固定附着。
Not this
Please fasten your shoelaces.
Use this
Please tie your shoelaces.
动词选择不当：fasten多用于扣合或固定（如安全带、纽扣），而系鞋带通常用tie表示打结系紧。受中文‘系’一词多义影响，学习者易误用fasten。
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动词的过去式和过去分词，可及物或不及物，常与to/with连用。
Dictionary facts from AI_FALLBACK, ECDICT.