there is 和 there have 属于there be句型的不同时态:
There be 句型有 三种时态:
1)
一般现在时态there is/are
2) 一般过去时态there was/were
3)
一般将来时there is going to /will be.
还可以用完成时态
There have been great changes in our hometown.
There be 结构主要用以表达"某处(某时)有某人(某物)",
基本句型为"There be + 某物或某人 + 某地或某时",
其中there 是引导词,没有词义;be是
谓语动词;
"某人或某物"是句子的主语;"某地或某时"作句子的状语,多是
介词短语。
如:
There is a football under the chair. 椅子下面有一个足球。
如: There is a football under the chair. 椅子下面有一个足球。