Unit 4 Wildlife protection
语法探究
现在进行时态的被动语态表示一个被动的动作正在发生或进行。构成形式为“be being done”，即由系动词 be + being + 及物动词的过去分词构成。其中的be应根据主语人称和数的情况相应地变化为am、is或are。 例如：
At the moment my house is being repaired. 目前我的房子正在修理。
I am bei ng interviewed by sev eral reporters now. 现在有好几个记者正在对我进行采访。
Many soldiers are being carried to that country by ship. Maybe there is going to be a war over there. 船正在把许多士兵运往那个国家，或许那儿将有一场战争。
［典例解析］1. With more forests being destroyed, huge quantities of good earth _____ each year.（2005山东卷）
A. is washing away B. is being washed away
