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主語 + 系動(dòng)詞 + 表語 常見的系動(dòng)詞有:be, seem, appear, become, go, get, grow, turn, look, sound, feel, taste, smell e.g. She is very happy. I am a student. He became nervous when thinking of stealing. It is impossible to find a shop that is open after 5 p.m. in this area. We are proud of our friends. To become a top gymnast, it is important to start when very young. It’s much cheaper to camp than to stay in a hotel. It is useless trying to argue with him. I got caught in the traffic. Just then, the traffic light turned red. He seemed to have misunderstood you. 【查看更多】

 

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as if和as though引導(dǎo)的從句所敘述的情況與事實(shí)相反時(shí)，從句的謂語動(dòng)詞多用虛擬語氣。在虛擬語氣結(jié)構(gòu)中，用________時(shí)態(tài)來表示現(xiàn)在的情形；用________時(shí)來表示過去的動(dòng)作或狀態(tài)；用________時(shí)表示正在進(jìn)行的動(dòng)作；用________時(shí)表示將要發(fā)生的動(dòng)作。

當(dāng)as if和as though從句的主語和主句主語一致，且從句中含有系動(dòng)詞be的某種形式時(shí)該主語和系動(dòng)詞可以省略。

例如：John paused as if(he was)expecting Mary to speak．

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