there be 句型中,be 动词后的名词为主语.be动词作谓语(有些句子也是there be句型,如there lived a fisherman on the island ),分词作定语,介词短语等作状语表地点,时间等.
1, are(谓语),many(定语)children(主语)playing(定语,相当于定语从句,children who are playing on the ground now. on the ground (地点状语), now(时间状语)(张道真语法))
2,are(谓语),only (状语)ten (定语)minutes(主语)remaining(定语)
3,he (主),donated(谓),some (定),money(宾),不定时短语(to...)(目的状语)
补充回答:playing 是children的定语,相当于定语从句的作用.
即:There are many children who are playing on the ground now.
如果没有there,在类似这样的句子中出现在系动词之后,就作表语.
如:Children are playing on the ground now.