grow up to be为什么要加be,weigh up to就不要加be

grow up to be为什么要加be,weigh up to就不要加be l want to be a scientist when he grows up为什么grow要加s to be grow up is to be What do you want to be when you grow up?这里为什么要用to be? I hope to be a singer when I grow up.为什么要用一般现在时 grow up to be your bride! It must be terrible to be grown up!这句话里为什么要加be呢? What are you going to be when you grow up?为什么be going to 后面要用be,而不用 do? 新概念英语第二册lesson17求解it must be terrible to be grown up 为什么用被动语态不是it must be terrible to be grow up呢 grow up还是be grown up“长大”的意思I want to ______(A) grow up(B) be grown up 关于“they can grow up to be 20 centimetres long and weigh up to 400 grams”的问题为什么grow up 后要加tobe?为什么weigh up后要加to?为什么前一个是to be, 而后一个就是to呢? What are you going to be when you grow up?有 when为什么不用 grown,grow 受什么限制? I want to be a scientist when I grow up为什么不用过去式 Tom want to be a pilot when he grow up.为什么写pilot It must be terrible to be grown up!grown up与grow up有什么区别 weigh up to 400 grams,live up to 150 years old,grow up to be 20 cm long为什么第三个有be动词? he wants to be a artist when he grows up.是将来时还是现在时wan和grow为什么加s啊 He wants to be a teather when he_____(grow) up.