【问】 seem to have done与seem to do有什么区别?

【答】 在seem(appear，happen)之后使用动词不定式的一般式，表示动词不定式所表达的动作、状态是与谓语动词seem(appear，happen)同时发生的。在seem(appear，happen)之后使用动词不定式完成式则表示动词不定式完成式所表达的动作、状态是在谓语动词seem(ap-pear，happen)之前发生的。

1. He seems to have missed train. (PEU)

他似乎没有赶上火车。

2. He seems to have lost all desire to write. (Yeats)

他似乎失去了一切写作愿望。

3. He did not seem to have changed. (Bennet)

他似乎没有改变。

4. He seemed not to have grasped what she really meant. (Snow)

他似乎没有领会她话的真正意思。

5. It never seems to have occurred to him that...(DAB)

似乎他从未想到……

6. ...he seems not to have been deflected from his political views. (DAB)

……他似乎并没有偏离他的政治观点。

请做下面的英语试题：

The earth seems_______originally part of the sun.

A. to be B. it is C. it belonged to D. to have been