零时态-一时态-二时态条件句必威体育精装版.pdfVIP

零时态条件句 We use the zero conditional when the result of a condition is always true. The time is not important because it is always a fact 表示客观真理，理所当然的事情 The structure is if + present simple + present simple 从句一般现在。主句一般现在 lf you heat ice ，it melts 第一时态条件句 We use the first conditional to show a result of a condition that is possible in the future 表示未来可能的结果 The structure is: if + present simple + will+ base verb 从句一般现在。主句一般将来 if it snows, l will go snowboarding 第二时态条件句 We use the second conditional to show a probable result of a condition in the future. Unlike the first conditional, the future condition is not a rea possibility. 对现在情况和将来情况的虚拟 The structure is if+ past simple + would+ base verb 从句一般过去。主句would+动词原形 If i won a million dollars, I would travel around the world 第三时态条件句 We use the third conditional to refer to a past condition that did not happen or an impossible past condition 对过去情况的虚拟 The structure is if + past perfect + would have + past participle 从句过去完成。主句would+have+done lf you had phoned yesterday, I would have asked you out to lunch today 练习 Practice: Zero conditional Which sentence below is a fact (F) Which is a habit (FO ） If you boil water, it turns into steam. _ If I miss the bus, I usually walk. _ If our teacher is principal, the school director teaches us. - lf you eat too much fast food, your health will suffer. _ lf you mix blue and red, you get purple. _ 练习 Fill in the spaces with a conditional tense (zero, first or second). Add 0,1 or 2 If i_______ ill Tomorrow, i ____stay at home. _ If i_______a million dollars, I ___buy a boat and sail around the world If you_____on your birthday, you______ have seven years bad luck. If you _________me to paint the room, i______ make you a special lunch. People_______ weight, if they______ more exercise. If i _______up early, I _________ the early train. _ Complete each sentence using a conditional tense (zero, first or second) If you gave me the mon