树上有一只鸟,there（ ）a bird in the tree

树上有一只鸟,there（ ）a bird in the tree 树上没有鸟There are not birds in the tree.还是There aren't any bird In the tree there is a bird .可以改为:There is a bird in the tre There is a bird on the tree.on the tree or in the tree There is a bird in the tree 改为一般过去式 连词成句:is,there,bird,a,the,in,tree. there is a bird in the tree变为复数形式 ________________ （come） there,there's a bird in the tree. There is a beautiful bird ______ the tree. （ A ） A、in B、on C is there a bird（ ）the tree?括号里填in还是on? There is a bird in the tree. 对 a bird 划线提问 新概念第一册第41课有个句子是There is a bird on the tree.外来物在树上不是用in 这里为什么