简单地说.完成时不能滥用.只要两个时间基本没有先后,就用一般时态,如果强调已经,当然用完成时.
比如：1.No sooner did he finish his home work than he went out to play.
2.Finishing his homework ,he went out to play.(主语一致）
3.Having finished his homework,he went out to play.(强调作业在前）
如果是叙述故事,用一般过去时,除非文章中强调时间先后顺序.
这些用惯了就行.
other 不定 the other 特指别的 others 复数不定