为什么自考官方不把答案发出来呢?第8题在有自考的日子里,不断会有人搜寻.——tolandontheislandseveraltimes,thepilotsentaradiomessagetotheheadquarterstoaskforhelp.AHavingfailedBFailingCHadfailed

Question

为什么自考官方不把答案发出来呢?第8题 在有自考的日子里,不断会有人搜寻.
—— to land on the island several times,the pilot sent a radio message to the headquarters to ask for help.
A Having failed B Failing C Had failed D Failed
在A 和 C徘徊,不知考哪个知识点,请详解这个知识点,

Answer 1

—— to land on the island several times,the pilot sent a radio message to the headquarters to ask for help.
A Having failed B Failing C Had failed D Failed
在A 和 C徘徊,不知考哪个知识点,请详解这个知识点,
答：考非谓语动词作状语.C是谓语动词形式（过去完成时态）,首先应排除.AB为现在分词,D为过去分词,它们的逻辑主语是the pilot.the pilot与fail是主动的关系,排除表被动的过去分词D.所以你应在AB中徘回才对.
Failing是现在分词的一般主动式,表示这个动作与主句谓语动作sent 同时发生或几乎同时发生.而having failed表示的动作在sent 之前就发生了.一般译作“在.之后”,从several times可知,应选择A为最佳:
几次试图在岛上着陆失败之后,那飞行员向总部发送无线电信息请求帮助.