9AChapter5Grammar.ppt

1、Grammar Adverbial clauses (II),CONTENTS PAGE,Introduction,if sentences:actions with definite results,if sentences: actions with possible results,Using if not and unless,Introduction,We use if sentences to talk about possible actions and the results of these actions. An if sentence has two parts. Eac

2、h part is called a clause. Each clause contains a verb.,If you stick a pin into a balloon, it bursts.,if sentences: actions with definite results,6-1,1,2,3,We use if sentences to talk about results that will certainly happen. In these sentences, both verbs are in the present simple tense.,If you coo

3、l water, it turns into ice.,If you boil water, it becomes steam.,4,5,6,6-2,1,2,3,In if sentences, the if clause can come first or second. When the if clause comes first, there is always a comma after it, e.g.,If you cool water, it turns into ice. Water turns into ice if you cool it.,Water becomes st

4、eam if you boil it.,4,5,6,Read these if sentences and match the possible actions with the results.,A1,6-3,1,2,3,4,5,6,Work in pairs. Read the dialogue below and make similar dialogues about the other sentences in A1.,A2,6-4,1,2,3,S1What happens if you take a fish out of water? S2It dies. S1Are you s

5、ure? S2Of course Im sure. If you take a fish out of water, it dies.,4,5,6,6-5,1,2,3,A pair of conditional clauses are spoken with a rising and falling intonation pattern, rising to a peak on the last word of the if clause.,If you take a fish out of water, it dies.,4,5,6,Complete these sentences with

6、 the words in brackets.,A3,6-6,1,2,3,A balloon _ it. (a pin/if/stick/you/bursts/into) Metal _ it. (you/heat/melts/if) Wood _ water. (you/into/put/if/floats/it) A glass _ it. (drop/you/breaks/if),bursts if you stick a pin into,melts if you heat,floats if you put it into,breaks if you drop,4,5,6,if se

7、ntences: actions with possible results,7-1,1,2,3,4,We also use if sentences to talk about results that will probably happen. In these sentences, the verb tenses are different. The verb in the if clause (first clause) is in the simple present tense. The verb in the second clause is in the simple futu

8、re tense.,If I invent a kind of special brain food, everybody will buy it.,5,6,7,Read the following examples:,7-2,1,2,3,4,If you use the link method, you will improve your memory.,You will remember things better if the pictures in your mind are silly, strange and colourful.,5,6,7,Williams mum is giv

9、ing him advice about his problems.Choose the correct half-sentences from the boxes to complete her advice for him.,B1,7-3,1,2,3,4,I sometimes take the wrong books to school. I was away from school today. I dont know what to do for homework. I hate getting up! I always feel tired in the mornings. I d

10、ont know what this word means. The link method doesnt help me much. I forget the pictures in my mind.,Williams problems:,Mums advice:,If you go to bed earlier, If you telephone your friends, If you check your timetable every night, If you look it up in the dictionary, If you think about each picture

11、 for 10 to 20 seconds,you wont feel tired in the mornings. it will stay in your mind better. they will tell you what homework to do. youll find out its meaning. you will know which books to take.,5,6,7,7-4,1,2,3,4,I sometimes take the wrong books to school. I was away from school today. I dont know

12、what to do for homework. I hate getting up! I always feel tired in the mornings. I dont know what this word means. The link method doesnt help me much. I forget the pictures in my mind.,Williams problems:,If you check your timetable every night, you will know which books to take.,If you telephone yo

13、ur friends, they will tell you what homework to do.,If you go to bed earlier, you wont feel tired in the mornings.,If you look it up in the dictionary, youll find out its meanings.,If you think about each picture for 10 to 20 seconds, it will stay in your mind better.,5,6,7,Carol is giving advice to

14、 Henry. What is she saying? Use the pictures and the words in brackets to help you.,B2,7-5,1,2,3,4,1,2,_ the wheel round, it _ more easily. (make/turn),The seeds _ _ in the soil. (grow/plant),If you make,will turn,will grow if you,plant them,5,6,7,_ another wing, it _. (put on/fly) _ your jumper, yo

15、u _ so cold. (put on/not feel) The meat _ in the fridge. (not go bad/put) You _ your glasses. (see better/wear),If you put on,will fly,If you put on,will not feel,will not go bad if you put it,will see better if you wear,7-6,1,2,3,4,3,4,5,6,5,6,7,We often use the probable conditional when we are sta

16、ting plans. Imagine you are planning an outing, and then complete these if clauses in different ways.,B3,7-7,1,2,3,4,5,6,7,The word unless means if not. For example, these sentences have the same meaning:,Using if not and unless,4-1,1,2,3,4,If you do not keep ice cream in a freezer, it melts.,4-2,1,

17、2,3,4,Unless or if not can be used as a first clause.,Unless or if not can also be used as a second clause.,Join the following sentences with if . not.,C1,4-3,1,2,3,4,you improve your handwriting/you will lose marks in the exam you will get toothache/you clean your teeth regularly this room will get

18、 very hot/you put the air conditioning on soon you understand this exercise/please put up your hand you close that window/lots of mosquitoes will get in the waiter comes soon/I shall leave this restaurant,If you do not improve your handwriting, you will lose marks in the exam.,You will get toothache if you do not clean your teeth regularly.,This room will get very hot if you do not put the air conditioning on soon.,If you do not understand this exercise, please pu