Bài soạn UNLESS

UNLESS AND HOW TO USE UNLESS Study this example situation: You can’t come in unless you are a member. This means: You can’t come in except if you are a member. Or: You can’t come in only if you are a member.  unless = except if Unless clause Main clause Present simple tense • Present modals +V {(will/can/must/have to/has to/ought to/may)+V} • Imperative form (mệnh lệnh cách) Past simple tense • Past modals +V (would/could/should/might/had to) EX: I will see you tomorrow unless I have to work late. (except if I have to work late) (Present modals +V) (Present simple tense) Unless Ann askes you, don’t tell her what I said. (except if Ann askes you) (Present simple tense) (Imperative form) I don’t like fish. I wouldn’t eat unless I was extremely hungry. (past modal+V) (past simple)  We often use unless in warnings: We will be late unless we hurry. Unless you work much harder, you won’t pass the exam.  Instead of unless it is often possible to say if…not: Unless Ann askes you, don’t tell her what I said  Don’t tell Ann what I said if she doesn’t ask you. We will be late unless we hurry.  We will be late if we don’t hurry. Fill in IF or UNLESS 1. ___________ he advertises in the newspaper he will sell a lot of goods. 2. ___________ I'm mistaken,that's certainly Mr Jones. 3. ___________ it's very cold,we will probably not have snow. 4. ___________ you use high quality material, you can't build a good house. 5. ___________ you finish work early,we can play tennis. 6. ___________ you don't keep your promises,you 'll lose your friends. 7. ___________ you study hard,you won't get a scholarship. Page 1 UNLESS AND HOW TO USE 8. ___________ you tell me what you want I can get it for you. 9. ___________ you think about it you will make the right decision. 10. She won’t know the truth ___________ you tell it to her 11. ___________ you arrive early, you’ll be able to meet the customers before the meeting. 12. ___________ she eats healthy food, she won’t lose some weight 13. won’t arrive on time ___________ they finish the work early 14. Will she be able to eat some cake ___________ I put eggs in it? Complete with the suitable verb tense 1.- He ___________ (forgive) you if you ___________ (tell) him the truth. 2.- We ___________ (not pass) the exam unless we ___________ (study) harder. 3.- If she ___________ (take) a painkiller, she ___________ (feel) much better soon. 4.- If your mother ___________ (ask) me, I ___________ (tell) her you went for a walk. 5.- ___________ ( you/buy) the T-shirt if she ___________ (have got) it in your size? 6.- If they ___________ (be) here tomorrow, they ___________ (try) to go to Susan’s party. 7.- ___________ (you/go) to the wedding if she ___________ (send) you an invitation? 8.- If Mark and Sally ___________ (cut) the red wire, the bomb ___________ (explode) 9.- I ___________ (receive) a prize if my composition___________ (win) the contest. 10.- If my boss ___________ (not give) me more work, I ___________ (arrive) home early. Choose IF or UNLESS and match each beginning with a suitable ending A B Answers 1. She won’t go to work a.- Sally doesn’t lend me her car 1- 2. Will you take part in the race b.- we spend all the evening working on it 2- 3. I won’t be able to visit you tomorrow c.- she feels better tomorrow 3- 4. The project won’t be ready today d.- the address is written incorrectly 4- 5. I won’t receive the letter e.- your bike is ready to be used? 5- Rewrite the following sentences: You must work much harder or you won’t pass the exam.  Listen carefully or you won’t know what to do.  She must apologise to me or I’ll never speak to her again.  You have to speak very slowly or he won’t be able to understand you.  The company must offer me more money or I’m going to look for another job.  You are allowed to enter the club only if you are a member. Page 2 UNLESS AND HOW TO USE  I’m going to the party only if you go too.  The dog will attack you only if you move suddenly.  He will speak to you only if you ask him a question.  The doctor will see you today only if it’s an emergency.  Fill in If/unless/as long as 1. ___________ you have a good reason you must come. 2. You can stay ___________ you like. 3. She can go out ___________ she promises to be back at midnight. 4. ___________ it rains you'll stay at home. 5. He can watch tv ___________ he stays quiet. 6. I won't come ___________ you ask me to. 7. She won't succeed ___________ she practises regularly. 8. He'll eat out ___________ he has too much to do. UNTIL VS. UNLESS Until A will only occur once B is done (the longer it takes to do B, the longer it will be until A happens. i.e. A happens immediately after B.) Example 1: He never caught a fish until his father showed him how. (Once his father showed him how to catch fish [B], he caught one [A].) Example 2: We can't use the playground until they catch the snake that is out there. (Playing on the playground [A] will not occur until catching the snake [B] occurs.) Unless If B is not done, A will not occur. (B may occur anytime before A.) Example: He never would have caught any fish unless his father had shown him how. (He would have gone on failing forever -- situation shown on top line -- if he had not been taught how to fish. Sometime after being taught, he succeeded in catching one [A occurred].) Example 2: We can't use the playground unless they have already caught the snake. (If B - catching the snake - occurred at some point in the past, then A -- playing on the playground -- can happen.) 1. I won't get a birthday present from Joe ___________ I invite him to my party. 2. My feet get cold ___________ I wear socks. Page 3 UNLESS AND HOW TO USE 3. She runs ___________ she is out of breath. 4. I can't go on the field trip ___________ my mom sends in a permission slip before the deadline. 5. I stay in my classroom ___________ it is time to go to P.E. 6. She is not allowed to get her ears pierced ___________ she is 13 years old. 7. I cannot wait ___________ school gets out for the summer. 8. I'm going to Disney World in two weeks ___________ my dad's car is still broken. 9. Sailboats can't move ___________ the wind blows. 10. He did not come to the cafeteria ___________ lunch was half over. 11. I will meet you at the theater at 5:00 ___________ I have to stay late at work. 12. ___________ you want to be sent to the dean's office, you need to sit down and do your work. 13. He's going to work on the car ___________ it runs properly. 14. They played at the pool ___________ the storm came and the lifeguard told everyone to get out. 15. Our dog jumped on visitors _________we took a dog obedience course and taught him to "stay." 16. I'm not going to be able to afford to go on the trip ___________ I win the lottery. In case/unless 1. Emma won't call you ___________ you give her your phone number. 2. Take a map with you ____________ you can't find the hotel. 3. Ask for a receipt __________ you need it later. 4.______________ fire, press the red button. 5. I won't lend you my car ____________ you promise to drive carefully. 6. The alarm won't work ____________ you turn it on. 7. We got a second key ____________ we lost the first one. 8. Call this number ______________ emergency. 9. Take your vaccination certificate with you ___________ they ask for it at the airport. 10. I'll see you at the meeting next week_____________ it's cancelled before then. Page 4 . wouldn’t eat unless I was extremely hungry. (past modal+V) (past simple)  We often use unless in warnings: We will be late unless we hurry. Unless you work. UNLESS AND HOW TO USE UNLESS Study this example situation: You can’t come in unless you are a member. This means: