be /bi:(重读)，bi(轻读)/ (现在式：am, is, are; 过去式：was, were；现在分词being；过去分词 been) I. link v. 1.是；成为：The world is round. 地球是圆的。What are you going to be when you grow up?你长大了准备干什么? 2. (和不定式连用，表示按计划安排要发生的事， 或打算做的事)： ［考句］Sir Denis, who is 78, has made it known that much of his collection is to be left to the nation. 78岁的丹尼斯先生已向公众宣布他的许多收藏品将留给国家。［考句］The second book was to have been completed by August 1952, but two years later, the end was still nowhere in sight.第二本书原打算1952年8月完成，但是两年过去了何时结束仍然遥遥无期。‖II.aux. v.1.构成进行时态：They are reading.他们在读书。I shall be seeing him soon. 我不久就会见到他。 2.构成被动语态：He was killed in the war. 他在战争中阵亡。Smoking is not permitted here. 此处禁止吸烟。‖III.vi. 1. (和there连用)在…有…：Where there’s a will, there is a way. ［谚］有志者事竟成。There must be something wrong.肯定出事了。There seems to be truth in what you say. 你说的话里似乎有些是真的。 2.(用于完成时)去过，到过，来过：Have you ever been to Beijing? 你到过北京吗?  Where have you been? 你到什么地方去了? 3.停留，继续： Don’t be long. 不要去得太久。Let them be.不要动它们(就让它们这样吧)。