we have looked for the pen everywhere.改为否定句

we've looked everywhere for her,but we can't find her.请问这其中的“have looked everywhere for her是什么结构,用在哪? We looked for you everywhere.和We have looked for you everywhere.有什么区别? we have looked for the pen everywhere.改为否定句 We ____ for him,but haven't found him.We ____ for him,but haven't found him.A.are lokingB.have looked答案选择B,可是我觉得选择A也对啊.这又有什么不同呢, we looked for the m( )boy ,but we couldn't find him where have you been?we（）youWhere have you been?we ( ) you.A.look forB.looked forC.have looked forD.are looked forE.were looked for哪个是正确的?请说明理由. I have ___ all my papers but I still can't find the contract A.looked through B.looked for C.looked I have looked for the book e_ ,but I can't find it We have T-shirt_____ green for only 8dollars We have T-shirts () green for only eight dollars. we have T-shirts for boys的同义句 We have T-shirt_____ green for only 8dollars we have T-shirts_____red.是for还是in? 根据所给字母补全单词1.We should make a c------ to improving our enviroment.2.We have looked for Jim e------,but we can't find him anywhere.3.Jim thought that t------- by train was like having a moving party.4.He p-------- to the new bike un we don't have much time for breakfast.[变同义句】we don't have[ ] [ ] [ ]time for breakfast How many of us have looked up at the stars and wondered about other worlds?How many of us abohave looked up at the stars and wondered ut other worlds?Of course,we know a great deal about the universe now but for people living thousands of years ago,t 选词填空 we homework with family why 1.they could't stay at home and looked after their __2.but inoe i know __they do so.3.they have to go away to make money for ___ so that we can live a better life my old parents always find fault with methey are old.although we've lived together forseveral decades,we still looked each other asstrangers.they don't have common senses andalways find faults with me and always maketroubles for me to solve.I hate th