there be 句型 会英语的来

there be是表示存在的例如：有个人在树下面 there is a man under the tree这里曾经是一片汪洋 there used to be a vast ocean当然也可以在后面接动名词,表示某种状态,例如：操场上是同学们踢足球 there are students playing football on the ground刚才并没有人打你 there was nobody beating you just now