therewas和thereis有什么不同,在用法上怎么用?

Question

there was 和there is 有什么不同,在用法上怎么用?

Answer 1

有时态上的不同,there was 用于一般过去时,there is 用于一般现在时,两者都用于表单数可数名词的存在或不可数名词的存在there is/ was a/ an+可数名词单数+in/ on/ under / near+地点 在某处有.例如：there is/ was a cat under the bed.在床下有只猫 there is/ was an apple on the desk.桌上有个苹果there is/ was some+不可数名词+in/ on/ under / near+地点 在某处有.例如：there is/ was some water in the glass.杯子里有水