【正文】 其否定或疑問形式都用can(could) 來表示.Since the road is wet, it must have rained last night.He can’t have missed the way. I drew him a map.“The dictionary has disappeared. Who could/can have taken it?”b. may / might have donemay / might have done 表示推測過去某事“也許”發(fā)生了.I can’t find my keys. I may / might have left them at the school yesterday.c. could have done 在肯定句型中, 往往用作委婉的批評.本可以做什么,而沒做。 couldn’t have lived D. If they were not。 can’t live B. Were it not。 should be operated D. was。 be operated on Ｂ. were。 (1)This kind of fish can eat a person in two minutes, leaving_ ( leave) only the bones. (2) Football is played in more than 80 countries, _making__ (make) it one of the most popular sports in the world. (3) It rained nonstop for ten days, pletely _ruining__(ruin) our holidays. (4) Lily’s mobile phone was left in a taxi accidentally, never _to be found___ (find) again. (5) His father disappeared, never _to be heard__(hear) from again.有賓語主動,無賓語被動. He seats himself at the back of the classroom.（做謂語）Seating himself at the back of the classroom, he can’t see the words on the blackboard clearly.（做狀語） He is seated at the back of the classroom. （做謂語）Seated at the back of the classroom, he can’t see the words on the blackboard clearly. （做狀語） Dressed (dress) in a new beautiful dress, she feels more confident. He hid himself / is hidden behind the door. Hidden (hide) behind the tree, the father couldn’t be found by his little son. Compared to /with cars, bicycles have some advantages. Judging from his expression / look on his face, he is far from satisfactory.Judged the best in a recent science petition, the three students were awarded scholarship totaling 27000 dollars. Seen from space, the earth looks blue. Tasting good, the food was soon sold out.語法三 ====虛擬語氣（一）if 虛擬從句主句與現(xiàn)在相反be→weredo→did Would/should/could/might+V原與過去相反Be→had beendo→had doneWould/should/could/might+have done/been與將來相反→were。 I hurried home, only to find nobody in. He woke up, only to find himself in the hospital. His parents died early, leaving him alone. It rained nonstop for ten days, pletely ruining our holidays. He was admitted to a key university this year, thus realizing his dream.* only to do 與doing 作結(jié)果狀語的用法“ only to do” 做結(jié)果狀語表意料之外的結(jié)果，尤指不愉快的結(jié)果。非謂語doing所表達(dá)的動作發(fā)生和謂語動作幾乎同時進(jìn)行。 in that=because。t think you can achieve your goal as planned.A. Unless B. Even C. Since D. TillHe never speaks _____ he is spoken to, for he is not much of a speaker.  6． as if(though) 似乎/仿佛/好像 +真實(shí)/虛擬7． even if /though 即使8． in case/for fear that 以防/惟恐9． What/whatever/no matter what。It is pretty well understood ___ controls the flow of carbon dioxide in and out of the atmosphere today.A. That B. when C. what D. howWhy don’t you bring ___ to his attention that you are too busy to do it?A. This B. what C. that D. it表“是否”時只用whether不用if:1. Whether the president will e is not known yet. (主從)2. The problem is whether we need it.（表從）3. The problem whether we will build another school hasn’t been settled.（同位語從句）4. He was worried about whether he passed the English examination. （介詞之后）5. It doesn’t matter whether she will e or not. （whether… or /or not）6. I don’t know whether to go.（動詞不定式之前）三、 狀語從句（主句完整，從句和主句之間不存在修飾關(guān)系的，一般就是狀從）1. 關(guān)于when/while/as 都有“當(dāng)…時” When I arrived, he had already left.Mary asked me to care for her pet while she was away. （當(dāng)…時） As the sun set in the west, it became darker and darker. As time goes by//as the economy developsWhen (正在這時)Be about to do…. When …Be doing … when…Had just done… when…Be on the point of doing … when…When==since whileHe likes pop music while I am fond of classical music. (而)Mary asked me to care for her pet while she was away. （當(dāng)…時）While I understand what you say, I can’t agree with you. （雖然）asA. 隨著+句子 as time went by as the economy develops With the exam ing/drawing near /approachingB. 像 + 句子 It looks a little ugly as it is .C. 作為 +短語 treat / regard / consider / think of / look on …… as （把 … 作為…來對待）D. 因?yàn)?句子 because /since/forAs you are Senior 3 students, you should spare no effort / pains to study. E. 正如 / 就像As is known to all/we all know, Taiwan belongs to China.As an old saying goes, it’s not until the Dragon Boat Festival that we can put away warm clothes.F. 雖然 + 句子（倒裝）= though 放句首a. 表語提前Young as/though he is, he speaks English fluently.Child as he is, he knows a lot. （冠詞去掉）b. 副詞提前Much as he likes her, he dare not tell her.=Although(though) he likes her very much, he dare not tell her.=He dare not tell her, though he likes her very much. though（放主句后面不倒裝）c. 動詞提前Try as she may, she still couldn’t convince her parents that she was more suitable for a lawyer than a teacher.d. 補(bǔ)語提前Pleasant as they made it to travel, we felt tired after the long journey.Although they made it pleasant to travel,2. 關(guān)于since/before/untilIt is/has been several months since we last spent the holiday in the country together.It was ten years since we had had such a wonderful time.Before He left before I could say “thank you” to him. 來不及Three years passed before I knew it. 才It won’t be long before we have a monthly exam.It will be ten years before we meet again. It was ten years before they met again.Until/till (主句謂語持續(xù)性)Not… until…(主句謂語短暫性)George worked for IBM until/till 2000. 直到靠近，我才認(rèn)出他。That 只有在賓語從句中可以省略。 缺名詞性成份時，指人用who/whom，指物用what。I have forgotten where we went yesterday.Where we went yesterday is covered with all kinds of flowers.Oh! This is where we came yesterday. This is the place where we came yesterday.Here, he made the promise that he would e here 10 years later.I will make a mark where he made the promise.需要用什么引導(dǎo)詞看從句。ll ne