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verb + onto + noun (movement onto a surface)
The cat jumped onto the table.
猫跳到了桌子上。
在……上；在……之上
先理解核心含义，再看它在真实句子里的用法。
在……上；在……之上
on the top of; upon; on
The cat jumped onto the table.
猫跳到了桌子上。
到达...之上(指物理或隐喻性移动)。
Arriving upon or on top of (speaking of a physical or metaphorical movement).
是满射,其陪域为(见下)。
Being an onto function with a codomain of (see below).
She climbed onto the roof to get the ball.
她爬上屋顶去拿球。
Please pour the sauce onto the pasta.
请把酱汁倒在意大利面上。
The cat jumped onto the sofa and fell asleep.
猫跳上沙发睡着了。
The cat jumped onto the table.
猫跳到了桌子上。
非正式用法，表示察觉或即将发现某事。
The detective knew he was onto something.
侦探知道他发现了线索。
She put the vase onto the shelf.
她把花瓶放到架子上。
Not this
The cat is onto the roof.
Use this
The cat is on the roof.
onto 表示动态的‘到…上面’，静态位置应用 on。
Not this
He jumped into the table.
Use this
He jumped onto the table.
onto 强调移动到表面，into 强调进入内部空间，此处表面对应 onto。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
爬上
He climbed onto the roof.
他爬上了屋顶。
跳上
The cat jumped onto the sofa.
猫跳上了沙发。
踏上
She stepped onto the platform.
她踏上了站台。
登上（汽车等）
We got onto the bus just in time.
我们及时上了公交车。
抓住
Hold onto the railing.
抓住扶手。
到地板上
The book fell onto the floor.
书掉到了地板上。
发现重要的事
I think you're onto something with that theory.
我觉得你的那个理论有道理。
知道某人的秘密
The police are onto him.
警察已经盯上他了。
遇到好事
He's onto a good thing with that new job.
他找到了一个好工作。
抓紧你的屁股！
In Jurassic Park, Samuel L. Jackson tells everyone to hold onto their seats.
在《侏罗纪公园》中，塞缪尔·杰克逊让大家抓紧座位。
不要停止相信，抓住那份感觉
She held onto the dream of becoming a singer.
她怀揣着成为歌手的梦想。
Use onto naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
onto = on + to，想象一个物体“走上”另一个物体的表面，即“在...之上”。
常见场景：物理空间、比喻方向 ‘onto’ 在日常和书面语中都很常见，通常表示移动到某个表面或位置，也可以用于抽象的方向或目标。
常与运动动词连用，如'get onto', 'step onto'。
Dictionary facts from ECDICT, WIKTIONARY.