during用法及时态

during的时态是现在时、过去时、现在进行时、过去进行时、将来时、过去完成时、过去完成进行时连用，比如：During his visit， the Pope will also bless the new hospital.在访问期间，教皇还将为新医院祈福；Sandstorms are common during the Saudi Arabian winter.在沙特阿拉伯，冬季里沙尘暴很常见。