Unit 5 The human brain 第四課時導學案（無答案）

1、9A M2U5 The human brain第四課時導學案由if, if.not和unless引導的條件狀語從句條件狀語從句 在句子中作條件狀語的從句稱為條件狀語從句，可置于句首、句尾，有時還可置于主語和謂語之間。引導條件狀語的連接詞有：if, unless等。如：If we pay much attention to the earth, well have a better world. I.條件狀語從句的兩種可能(1)主句從句都為一般現(xiàn)在時，表示這一行為引起的必然結果，可用when代替if。If(when)you heat water, it boils 如果你加熱水，它會沸騰。(2)

2、從句謂語動詞為一般現(xiàn)在時，主句謂語動詞為一般將來時或情態(tài)動詞及祈使句形式，表示將可能引起的結果。We may buy a car if my husband passes the test. 如果我丈夫通過測試，我們可能會買輛車。II. if 條件句的時態(tài)搭配if從句用一般現(xiàn)在時，主句用一般將來時If he runs, hell get there in time.如果他用跑的，他就會及時趕到那兒。if從句用一般現(xiàn)在時，主句用may/might/can/must/shouldV.原If you want to lose weight, you must/should eat less brea

3、d. 如果你想減肥，你必須/應該少吃面包。從句用一般現(xiàn)在時，主句用一般現(xiàn)在時 If you heat ice, it turns to water.如果把冰加熱，它就會化成水。注意:1 Unless = ifnot 2 if = not unless第四課時學習診斷I. Choose the best answers.（ ）1. Ill go to meet you if I _free.A. would be B. will be C. am D. was（ ）2. I wont write to John _ he writes to me first.A. if B. whether C

4、. while D. unless （ ）3.Peter will cook for his parents _ the International Day of Families comes. (2012 38題)A. unless B. when C. until D. though （ ）4.We will have no water to drink _we dont protect the earth. (201037.題）A. until B. before C. though D. If ( )5. The artist didnt stop improving his pain

5、ting _he got satisfied.A) unless B) because C) when D) until. Rewrite the following sentences as required 1. I wont go to Kittys birthday party if she doesnt invite me.(保持句意不變)I wont go to Kittys birthday party _ she _ me.2. Take the underground，or youll be late for the lecture.(保持句意不變)You _ be the

6、late for the lecture _ you take the underground.3. We will have no water to drink unless we learn to save water.(保持句意不變) We will have no water to drink _ we _ learn to save water.4. I wont go to the party unless Im invited. (保持句意不變)I_ go to the party _ Im invited.5. I will sleep with the window open

7、 unless it is really cold. (保持句意不變)_it _ really cold, I will sleep with the window open.6.You will get a toothache. You dont clean your teeth regularly. (保持句意基本不變)You will get a toothache_ you clean your teeth.7.You will be late for school unless you get up early. (保持句意基本不變) You will be late for sch

8、ool you get up early.(每空格填一詞)8. You will pass the exam if you work hard. （保持原句意思）You pass the exam you work hard.（每空格填一詞）9. go out/ tomorrow/ I/rains/wont/if/it(連詞成句)_10.glasses/ see/ I wear/will/if/more/I/clearly(連詞成句)_. Reading comprehensionChoose the best answerWe surveyed(調查) 300 young people on

9、 what they like to do at weekends. One hundred people are from the ages of 11-18, one hundred 19-26 and one hundred 27-35. The following shows their answers:( )61. How many people enjoy playing computer games in the 11-18 group?A. 20. B. 50. C. 60. D. 75.( )62. What do the people of 19-26 enjoy doin

10、g most?A. Watching TV. B. Going to the movies.C. Playing computer games. D. Taking a walk.( )63. Which two activities do most people enjoy doing? A. Playing computer games and watching TV.B. Playing computer games and taking a walk.C. Watching TV and going to the movies.D. Going to the movies and taking a walk.( )64. From the chart above, we can see the older people are, the more they like _.A. watching TV B. taking a walk C. going to the movies D. playing computer games( )65. Which of the following is TRUE according to the chart? A. Fewest people like tak