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.夜里他醒了 3 次.
但在使用時(shí)有以下幾點(diǎn)不同：
(1) 比較而言,during 更強(qiáng)調(diào)時(shí)間的延續(xù),in 只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為常見.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等表示行為要持續(xù)一段時(shí)間的名詞之前,只能用during 而不能用in.如：
The phone rang during the meal.吃飯時(shí)電話鈴響了.
I went to see my aunt during my stay in Beijing.在北京逗留期間,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.夏天我們常在森林里露營.（泛指）　　
During the summer we camped in the forest.今年夏天我們?cè)谏掷锫稜I.（特指）