句子成分一．主语（ subject）: 句子说明的人或事物
请找出下列句子的主语并指出什么（词，短语或句子）可以充当主语
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）常见错误分析2：动词及其短语在作句子的主语时， 只能使用其 to do 或 doing 的形式
其中不定式强调具体的某一次的动作，-ing 强调经常发生的动作
play computer games does no good to us
Have a walk in the street is her hobby
Go home at once is his decision 4
Make more friends will do good to us
I’m like computer very much
The story was happening the year before last
二．宾语：1．动作的承受者 -----动宾请找出下列句子的宾语并指出什么可以充当宾语
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
