Question

I have heard it repeat that后面是从句，这句话哪个是主语，谓语，宾语？

Answer 1

l 主语

have heard 谓语

it 形式宾语

repeat 应该用过去分词repeated ,宾语补足语

That 从句是真正的宾语从句

Answer 2

I是主语， have heard是谓语,用的是现在完成时态，it是宾语，repeat是宾语补足语，that后面的从句是repeat的宾语从句。