he finished writing the composition early last night 为什么writ加ing
问题描述：
he finished writing the composition early last night 为什么writ加ing
答
He finished writing the composition early last night.
昨晚他早早地就写完作文了.
finish doing,做完某事.finish后的动词必须要用动名词形式做宾语,所以write要加上ing.