几道英语动词填空1.the books _______(belong) to the school library mu

几道英语动词填空
1.the books _______(belong) to the school library must be returned at once.
2.john is always the last _______(leave) the office.

1.belonging------现在分词短语作状语,修饰主语 the books ,表示是：图书馆里的书
本句的主语是the books,谓语（动词）是 must be returned.所以该句不缺动词,那么belong只能以分词形式做状语了.
2.to leave
本句的意思是约翰总是最后一个离开办公室的.john is always the last ----是该句的主体,主系表都全了,不缺主体成分了,所以后面的 to leave the office 是修饰成分,是修饰 表语 the last（最后一个人）的状语,不定式（to do）做状语.