be助词 v.aux. 1.(与动词的现在分词连用,构成各种进行时态)正在...,在...I won't be free this afternoon. I'll be seeing a friend off. 我今天下午没空,我要给朋友送行。 What were you doing from 9 to 11 this morning? 今天上午九点到十一点你在做什么? He is working. 他在工作。 2.(与及物动词的过去分词连用,构成被动语态)被...The problem was solved long ago. 问题早解决了。 It will be discussed tomorro...
