D.這題是as if 引導(dǎo)從句的省略現(xiàn)象.完整句應(yīng)該是：
...as if (he was going )to see.
as if 的用法
as if 好像,好似 She spoke to me as if she knew me.她和我說話的神情,好像她早就認(rèn)識(shí)我似的.(= as though)
as if 的用法
一、as if 從句的作用
(1)． 在look,seem 等系動(dòng)詞后引導(dǎo)表語從句.如：She looks as if she were ten years younger． 她看起來好像年輕了十歲.
(2)． 引導(dǎo)方式狀語從句.如：She loves the boy as if she were his mother． 她愛這男孩,就好像她是他的母親一樣.The child talked to us as if he were a grownup． 那孩子跟我們談起話來,像個(gè)成年人似的.二、as if 還可用于省略句中 如果as if 引導(dǎo)的從句是“主語＋系動(dòng)詞”結(jié)構(gòu),可省略主語和系動(dòng)詞,這樣as if 后就只剩下名詞、不定式、形容詞（短語）、介詞短語或分詞.
如：He acts as if （he was） a fool． 他做事像個(gè)傻子.Tom raised his hands as if （he was going） to say something． 湯姆舉起手好像要說什么.She left the room hurriedly as if （she was）angry． 她匆忙離開房間好像生氣的樣子.
三、as if 從句的語氣及時(shí)態(tài) (1)． as if 從句用陳述語氣的情況.當(dāng)說話者認(rèn)為句子所述的是真實(shí)的或極有可能發(fā)生或存在的事實(shí)時(shí).如：It sounds as if it is raining． 聽起來像是在下雨.He talks as if he is drunk． 從他談話的樣子來看他是醉了.(2)． as if 從句用虛擬語氣的情況.當(dāng)說話人認(rèn)為句子所述的是不真實(shí)的或極少有可能發(fā)生或存在的情況時(shí).從句虛擬語氣動(dòng)詞時(shí)態(tài)的形式如下：
1.如果從句表示與現(xiàn)在事實(shí)相反,謂語動(dòng)詞用一般過去時(shí).如：You look as if you didn’ t care． 你看上去好像并不在乎.He talks as if he knew where she was． 他說話的樣子,好像他知道她在哪里似的.
2.從句表示與過去事實(shí)相反,謂語動(dòng)詞用“had＋過去分詞”.如：He talks about Rome as if he had been there before． 他說起羅馬來好像他以前去過羅馬似的.
3.從句表示與將來事實(shí)相反,謂語動(dòng)詞用“would／could／might＋動(dòng)詞原形”.如：He opened his mouth as if he would say something． 他張開嘴好像要說什么.It looks as if it might snow． 看來好像要下雪了.