There is a nice schoolbag on the desk.
引导词 谓语 主语 地点状语
I will try.
主 谓语
Little Tom looked very excited yesterday.
主语 谓语（系动词） 表语 状语
He has intvited Mary to help him.
主 谓语 宾 宾补
Lisa bought two books in the new bookshop.
主 谓 宾 状语
There is a nice schoolbag on the desk.
引导词 谓语 主语 地点状语
I will try.
主 谓语
Little Tom looked very excited yesterday.
主语 谓语（系动词） 表语 状语
He has intvited Mary to help him.
主 谓语 宾 宾补
Lisa bought two books in the new bookshop.
主 谓 宾 状语