she will be an actress( )two years

she will be an actress( )two years .为什么用in而不用after?he said he found learning chinese( )because he couldn't understand people为什么用frustrating而不用frustrated(1介词IN 加时间段表示将来； AFTER ...这里的frustrating 修饰的不就是he这个人吗？FRUSTRATED 用来修饰人的，frustrating充当Chinese 宾语补足语Someone finds Chinese ( frustrating )=某人发现汉语是令人沮丧的，令人懊恼的 Someone finds Chinese frustrating = Someone finds that Chinese is frustrating 希望这次能理解明白并及时采纳，谢谢！