There is there be句型遵循就近原则 一只鸟 是单数
There is a bird and two cats in the tree.这里要遵循就近原则。祝您学习进步,更上一层楼!(*^__^*)
There is a bird and two cats in the tree 这里用的是就近原则
这有一只乌龟和两只猫There is a tortoise and two cats
靠近原则,一只鸟在前就用is