用in,a,bird,is,tree,the,there连词成句子

There is a bird in the tree.为什么用In.能不能用on. There is a bird in the tree.为什么是用in,不能用on, There is a bird in the tree 改为一般过去式 there is a bird in the tree变为复数形式 There is a bird on the tree.on the tree or in the tree bird the in singing tree is a 连词成句bird the in singing tree is a连词成句 The bird is in the tree._____you find it?A.Aren't B.Can not C.Cannot D.Can't The bird is in the tree.()you see it?-A.can not B.can't C.don't a bird is（） the treethere is a bird ( )the tree填on还是in There is a bird ( ) the tree.是用on 还是用in 用in,a,bird,is,tree,the,there连词成句子 there is not a bird in the tree为什么用not为什么不是 none nobody nothing There is a bird in the tree. 对 a bird 划线提问 I saw a bird in a tree! there is a bird in the tree.There is an apples on the tree为什么第一句用in,第二句用on呢? Look,there is a bird（）that tree.A in B on C atLook,there is a bird（）that tree.A in B on C at mike is a factory worker等于mike is ___ ___ ___the factorythe bird is in that tree=____ ____a bird in that tree. There is a little bird in the tree.There are many pears on the tree.都是在树上为什么一个用in一个用on?