英语划分句子成分

Question

It take sb. sometime to do sth.
Sb. spend sometime doing sth.
It is important for sb. to do sth.

Answer 1

It take sb. sometime to do sth.
it做形式主语，真正的主语是后面的to do sth，谓语是take，sb是间接宾语，sometime直接宾语
Sb. spend sometime doing sth.
主语sb 谓语spend，宾语sometime，宾补doing sth
It is important for sb. to do sth.
it做形式主语，to do sth做真正主语，谓语是系表结构 is important， for sb介宾结构做状语。

Answer 2

It take sb. sometime to do sth.
形式主语 It
谓语 take
宾语sb
宾语补足语 sometime
真正主语 to do sth

Sb. spend sometime doing sth.
主语sb
谓语 spend
宾语 sometime
宾语补足语 doing sth.

It is important for sb. to do sth.
形式主语 it
谓语 is
表语 important
介宾短语 for sb.
真正主语 to do sth.本回答被提问者采纳