___ the weather report ,they didn't sail the boat out of the harbor .A Hearing B Having heard C To hear D Having been heard
问题描述：
___ the weather report ,they didn't sail the boat out of the harbor .
A Hearing B Having heard C To hear D Having been heard
答
B
答
B
这里having heard the weather report作状语，表示原因
答
选 B
这里是非谓语动词做状语的考察点
非谓语形式可以分为：现在分词,过去分词,动词不定式
doing表示现在和主动
to do 表示将来和主动
done表示完成和被动
这里是they做主语,所以排除D,不用被动态.从 didn't判断是已经发生了,排除C,不用不定式.
A和B中, A是表示现在听到, B是现在分词的完成态,表示这个动作先于主句的谓语动词发生,这个句子中是表示听到天气预告先,然后他们才不出海,所以选 B.