conj.?在 ... 以前
pref.?在 ... 以前；在..前面
adv.?以前；以往；之前
短語
Before Class?上課前 ;課前;上課之前; 課前預習
before service售前服務;售前辦事
than before比以前;前比
Not Before?不早於;有效起始日期;不得先於; 在此之前
Before Image?前映象;前鏡像;前像;前影像
Before Landing著陸前的準備;著陸前的預備
before 懲罰之前
put before ?放在前面
shortly before ?前不久;在; 以前不久
雙語例句：
I have seen him before.
我以前曾經見到過他。
《新英漢大辭典》
They have to vacate their offices before Wednesday.
他們必須在星期三以前將辦公室騰出來。
dict.kekenet.com
He passed me by as though he had never in his life seen me before.
他不理我，好像在他的生活中他以前從未見過我似的。
《21世紀大英漢詞典》
His big book is an expansion of the little book he wrote before.
他那本大部頭著作是由他以前寫的那本小書擴充而成的。
《新英漢大辭典》
No conclusion should be drawn before all the facts are buttoned down.
所有事實弄清以前，不應該下任何結論。
wap.97lk.com
Before going away, he managed his household affairs.
在離開前，他把家務都料理好了。
www.kfyes.com
Girls spring up faster than boys before 18.
在18歲以前女孩子比男孩發育得快。
He paused before the door.
他在門前停頓了壹下。
dj.iciba.com
A deep hole in the earth gaped before us.
我們面前的地上裂開了壹個深坑。
97lk.com
He nicked the tree before he left there.
在離開那裏之前，他在樹上刻上了痕記。
dict.kekenet.com
Before sweeping the house she bound up her hair in a large handkerchief.
打掃房屋前，她把頭發用壹塊大手帕紮起來。
dj.iciba.com
You must check your luggage in before noon.
妳必須在中午以前將行李交運。
《21世紀大英漢詞典》
She got there before us.
她比我們先到了那裏。
《21世紀大英漢詞典》
Who occupied this house before it was let to us?
這所房屋租給我們以前是誰住的?
《新英漢大辭典》
She wouldn't hold it against you that you have let her down once before.
妳以前曾使她失望這件事不會使她對妳抱有成見。
《21世紀大英漢詞典》
Write her before you go.
妳去之前先給他寫封信。
《21世紀大英漢詞典》
He had never been brushed off so rudely before.
他以前從沒遭到過如此粗暴的拒絕。
《21世紀大英漢詞典》
You must rubber-stamp those letters before you post them.
在郵寄那些封信以前，妳必須在上面蓋上橡皮圖章。
《21世紀大英漢詞典》
He hit out at me before I did.
在我想打他之前，他猛擊了我壹拳。
《21世紀大英漢詞典》
We should remember all those who have gone before us.
我們應該記住所有那些先驅者。
《21世紀大英漢詞典》