句子成分分析 1. 主语（subject）：句子说明的人或事物。 The sun rises in the east （名词）
He likes dancing. （代词） Twenty years is a short time in history. (数词
Seeing is believing. （动名词） To see is to believe.（不定式）
What he needs is a book.（主语从句） It is very clear that the elephant is round and tall like a tree. （It形式主语，主语从句是真正主语） ① The teacher with two of his students is walking into the classroom. ② There is an old man coming here. ③ The useful dictionary was given by my mother last year. 1
④ To do today's homework without the teacher's help is very difficult. 2. 谓语（predicate）：放在主语的后面。Be动词/系动词/情态动词/助动词/行为动词 Be动词：is/am/are/was/were 系动词：be, sound（听起来）, look（看起来）, feel(摸起来，smell（闻起来）, taste（尝、吃起来）, remain（保持，仍是）, feel（感觉），become, turn, get , grow… 情态动词: can/could/may/might/should/shall/must/…+do 没有人称和数的变化 助动词：do/does/did 3. 宾语：动宾，介宾 A. 动宾I like China. （名词）
He hates you. （代词） How many do you need? We need two. （数词） I enjoy working with you. （动名词） I hope to see you again. （不定式）
