1、To learn the usage of “if and unless”,Learning aims:(1),Guide one,1. Look at the following pictures and use the sentences with “if” to talk about them.,If I am free, I will visit Hongshan Zoo.,If I go to Hongshan Zoo, I will see bears.,I will see bears if I go to Hongshan Zoo.,What will you see if y
2、ou go to Hongshan Zoo?,If I go to Hongshan zoo, I will see elephants.,I will see elephants if I go to Hongshan zoo.,What will you see if you go to Hongshan zoo?,If I go to Hongshan Zoo, I will see giant pandas.,I will see giant pandas if I go to Hongshan zoo.,What will you see if you go to Hongshan
3、Zoo?,simple present tense 一般现在时,simple future tense 一般将来时,If hunters catch a giant panda,they will kill it for its fur.,Conditional Sentences(条件状语从句）,soon there will be no giant pandas in the world.,If we do nothing,If-clause(从句) Main clause（主句）,Ifclause (一般现在时）,Main-clause(一般将来时）,Main-clause(一般将来时）
4、,Ifclause (一般现在时）,comma,Practice in class,Finish the exercise on P84,If I (go, will go) to the Reading Club this afternoon, I (do not have,may not have) any time to watch TV. 2. If Simon (gets, will get ) home too late, he (miss, will miss) his favourite cartoon. 3. If Amy (completes, will complete)
5、 all her homework quickly, she(watches, will watch) the chat show. 4. If Daniel (takes, will take) part in the game show, he (wins, mightwin) a prize. 5. If Sandy (finds, will find) a programme interesting, she (introduces,will introduce) it to us.,A2 :,Dad: What will a bear do if it is in danger? M
6、illie: If a bear_, it _ people. Dad: What will a polar bear do if it is hungry? Millie: If a polar bear _, it _fish from the water. Dad: What will elephants do if they are thirsty? Millie: If elephants _, they _ till they find a river. Dad: What will tigers do if they live in the wild? Millie: Tiger
7、s _ for their own food if they _. Dad: What will tigers do if they have babies? Millie: Tigers _ as a family if they _. Dad: What will male wolves do if there is danger? Millie: Male wolves _ their families if there _.,is in danger,will attack,is hungry,will catch,are thirsty,will walk,will hunt,liv
8、e in the wild,will live,have babies,will protect,is danger,attack catch hunt live protect walk,Unless=If not,Guide Two,We can use unless to say that something can only happen or be true in a particular situation.,The situation will continue unless humans stop hunting them for their fur and bones.,Th
9、e situation will continue _humans _stop hunting them for their fur and bones.,if,dont,1.除非他打电话我，否则我就去.I will go _he telephones .2.不要离开房子除非我叫你离开. Dont leave the house _I tell you to . Dont leave the house _I _ tell you to. 3. 除非你尽力了，否则你将不会实现梦想。 _ you try your best, you wont realize your dream. 4.你马上离开就不会迟到。You will be late _ you leave right now.,I will go _he _telephone .,Exercises,unless,unless,Unless,unless,if,doesnt,if,dont,The unless-clause can come first or after the main clause.,Practice in class,Finish the exercise on P86 Keys: 1-c 2-d 3-f 4-a 5-b 6-e,
