从前英文once

LONG LONG AGO

从前:1. previously2. formerlyRelative explainations: Examples:1. 从前人们在手术前用乙醚来使病人昏睡。 Ether was used formerly to put a patient to sleep before an operation.2. 从前, 有一位非常美丽的公主。 Once upon a time, there lived a princess who was very beautiful.3. 从前, 在一个小村庄里住着一位老人。 Once upon a time, there was an old man living in a small village.4. 我从前没有见过他。 I hadn't seen him previously.5. 从前医生常常给病人放血. Doctors used to bleed people when they were ill.6. 从前有个美丽的公主.... Once upon a time there was a beautiful princess...7. 从前有一个公主. Once upon a time there was a princess.8. 这本书从前很出名, 现在没人看了. This book was once famous, but nobody reads it today.

once就可以了，放在句子开头

once upon a time (童话里经常听到，或者比较正式的书面语也可以用)但是一般都用 used to，或者 long time ago，再就是用过去式也可以表示“以前”怎么怎么样。。

onceadv. 一次；曾经conj. 一旦n. 一次，一回once [wʌns] adv.1. 曾经，一度2. 从前3. 一次，一回4. [用于否定句、条件句等]一旦5. (亲属关系上)上一辈，隔一代6. 乘以一7. [用于否定句]完全；一次地8. [方言]立即，马上9. [古语]将来总有一天adj.从前的；一度的n.一次，一回conj.一…(就)…，一旦…(就…)：Once you're finished, go home.干完活儿，你就回家吧。

once upon a timebeforetimeformerlyin the past

一次;曾经，一度；从前；一次，一回;一旦；立即，马上；从前的；一度的；