during可用于一般过去时、一般将来时以及现在完成时等三种时态。during常用作介词，意思是“ 在 …… 期间”，除此之外，during还可用来表示延续某事件的全过程，意思是“在…整个期间内”。

词语用法
1、在…整个期间
During this time, they are called undergraduate students.
在此期间，他们被称为大学本科生。
2、在…期间的某个时候
The thief broke into the house during the night.
小偷在夜间破门进入住宅。

例句
He swims every day during the summer.他夏天每天游泳。
The thief broke into the house during the night.小偷在夜间破门进入住宅。
He was born in China during World War II and educated in England.他在二次大战期间生于中国，后来在英国受。
During which years was he Prime Minister?他从哪一年到哪一年担任首相？
The sun gives us light during the day.太阳在白天给我们光
