难点:句中出现的some要改成any。 2. 肯定回答为:Yes, there is/are. 3. 否定回答为: No, there isn’t/aren’t. eg:可数名词单数1. 肯定句There isan apple on the tree. 疑问句Is therean apple on the tree? 肯定回答: Yes, there is. 否定回答: No, there isn’t...