during 的用法詳解
1. 表示“在……期間”，是介詞，不要將其誤用作連詞。如：
他在巴黎期間，與他的朋友住在一起。
誤：During he was in Paris, he lived with his friends.
正：While he was in Paris, he lived with his friends.
正：During his stay in Paris, he lived with his friends.
2. during 和 for 均可表示一段時(shí)間，但兩者有差別。
(1) during 通常表示事件發(fā)生在何時(shí)（when），而for則表示事件持續(xù)了多長(zhǎng)時(shí)間（how long）。如：
He was in hospital for six weeks during the summer. 他在夏天住了 6 個(gè)星期的毉院。
(2) 兩者之後均可接由 the whole 引起的時(shí)間短語，但通常不能接由 all 引起的時(shí)間短語。如：
他整個(gè)夏天都住在那兒。
正：He stayed there for [during] the whole summer.
誤：He stayed there for [during] all the summer.
(3) 在“數(shù)詞+時(shí)間名詞”之前以及在some time, a long time之類表示泛指一段時(shí)間的詞組之前，可用介詞 for，但不用 during。如：
He lived here for ten years (for some time). 他在這兒住過 10 年（一段時(shí)間）。
3. during與in均可表示“時(shí)間點(diǎn)”，有時(shí)可互換。如：
I'll be on holiday in [during] August. 我將在8月度假。
He woke up three times in [during] the night. 夜裡他醒了 3 次。
但在使用時(shí)還有以下幾點(diǎn)要注意：
(1) 比較而言，during 更強(qiáng)調(diào)時(shí)間的延續(xù)，in 衹是指一般性的某一時(shí)間。因此若表示狀態(tài)或習(xí)慣性動(dòng)作，多用during，否則以用in爲(wèi)常見。如：
Many people suffered hardship during the war. 許多人在戰(zhàn)爭(zhēng)期間受苦遭難。
He was injured in the war. 他在戰(zhàn)爭(zhēng)期間受了傷。
(2) 在stay, visit, meal等表示行爲(wèi)要持續(xù)一段時(shí)間的名詞之前，衹能用during 而不能用in。如：
The phone rang during the meal. 喫飯時(shí)電話鈴響了。
I went to see my aunt during my stay in Beijing. 在北京逗畱期間，我去看了我的姑媽。
(3) 與季節(jié)名詞連用，in表泛指，during表特指。如：
In summer we often camp in the forest. 夏天我們常在森林裡露營(yíng)。（泛指）
During the summer we camped in the forest. 今年夏天我們?cè)谏盅e露營(yíng)。（特指）