Question

and where have you been

where have you been?we have been looking for you everywhere.
i(worked out)a teaching plan in my office.为什么这里不填have been working out.had been working out; had been work out

Answer 1

where have you been?we have been looking for you everywhere.
根据where have you been?我们知道“we”已经结束了【寻找“you”的动作,而 have been looking for you everywhere是在“你出现在我们面前之前发生的动作”.have been doing sth是【现在完成进行时】,表示动作发生在过去,没有间断一直延续到现在.
i(worked out)a teaching plan in my office.为什么这里不填have been working out.had been working out; had been work out
因为worked out是一般过去时,单纯表动作发生在过去；have been working out是现在完成进行时,跟上面的 have been looking for you everywhere一样是现在完成进行时,表示的概念是一样的；.had been working out是过去完成进行时,它表示的概念是动作发生在【过去的过去】,是一个相对时态,即：相对【某个过去时间】来说更先前的动作,而且也是一直没有间断持续到【过去】；没有 had been work out这种时态.
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