1.下列說法中正確的是：

A.氣體的溫度升高時，分子的熱運(yùn)動變得劇烈，分子的平均動能增大，撞擊器壁時對器壁的作用力增大，從而氣體的壓強(qiáng)一定增大

B.氣體體積變小時，單位體積的分子數(shù)增多，單位時間內(nèi)打到器壁單位面積上的分子數(shù)增多，從而氣體的壓強(qiáng)一定增大

C.壓縮一定量的氣體，氣體的內(nèi)能一定增加

D.分子a從遠(yuǎn)處趨近固定不動的分子b，當(dāng)a到達(dá)受b的作用力為零處時，a的動能一定最大

　　　　 a. I would rather he came next Saturday.

　　　　 b. I would prefer you had seen the film yesterday.

　　 　　c. I would rather that he painted the house blue.

　　 　　a. If only he didn’t drive so fast! ( =I wish he didn’t drive so fast.)

　　 　　b. If only he had taken the doctor’s advice. ( =I wish he had taken the doctor’s advice.)

　　 　　c. If only the rain would stop! ( =I wish the rain would stop.)

　　 　　a. It is time we got up.

2.在動詞suggest (建議), advise (建議), demand (要求), require (要求), order (命令), insist (堅(jiān)持)后的賓語從句中, 謂語動詞常用“( should )+動詞原形”的虛擬語氣形式

　　　　 a. I suggested that we should go there at once.

　　 　　b. I demand that he should answer me at once.

　　 　　c. The doctor insisted that the patient should stay in bed for two weeks.

　　 　　d. The officer ordered that the soldiers should stop playing.

與名詞suggestion建議 / advice 建議 / demand要求 / request要求 / order命令有關(guān)的從句(包括同位語從句和表語從句等)中的謂語也用 “( should ) +動詞原形”

　　　　 a. The black people made a strong demand that the government ( should ) take steps to change the unfair situation.

　　　　 b. Their demand is that the government should take steps to change the unfair situation.

　　 　　c. I was Bill’s suggestion that everybody should have a map.

　　 　　d. His suggestion was that everybody should have a map.

1.在wish的賓語從句中, 通常表示不可能實(shí)現(xiàn)或沒有實(shí)現(xiàn)的愿望, 常用虛擬語氣

　　 ①.wish的賓語從句用過去式, 表示現(xiàn)在或?qū)�來沒有實(shí)現(xiàn)或不可能實(shí)現(xiàn)的愿望

　　　　 　a. I wish I knew the result of the match now.

　　　　 　b. I wish it were spring here all the year round.

　　　　 　c. I wish I could help you.

　　　　 　d. I wish I were young.

　 �、�.wish的賓語從句用過去完成式, 表示過去沒有實(shí)現(xiàn)或不可能實(shí)現(xiàn)的愿望

　　　　 　a. We wish we had got the film tickets last night.

　　　　 　b. I wish you I had met him yesterday.

　 　③.wish的賓語從句若用would, 則一般表示請求, 對現(xiàn)狀不滿或希望未來有所改變

　　　　 　a. I wish the prices would come down.

　　　　 　b. I wish you would help me.

　　　　 　c. I wish he would be more careful.

　　　　 　d. We wish you would spend the holiday with us.

如果表示說話人的看法, 想法或意見, 在句型 “It is / was + adj. + that從句”中, 主語從句中可用虛擬語氣. 主語從句中謂語動詞用should do表示現(xiàn)在或?qū)�來情況, 用should have done表示過去情況

　 　　　a. It is necessary that you should clean the lab before you left.

　 　　　b. It is important that you should take the doctor’s advice.

　 　　　c. It was very strange that he should have left without say goodbye.

在此類復(fù)合句中, 若表示與事實(shí)相反, 可用虛擬語氣形式. 主從句的謂語動詞形式與非真實(shí)條件句相同

　　　　 a. Even if I were rich, I would work.

2.表示與過去事實(shí)相反的情況, as if / though從句謂語用過去完成式

　　　 　　a. The machines operated as if it had been repaired.

1.表示與現(xiàn)在事實(shí)相反或?qū)ο嘣谇闆r有所懷疑, as if / though從句謂語用過去式

　　　 　　a. He speaks English so well as if she had studied English in England.

　 　　b. She looked as if she were ill.