总结好的：IF引导的条件状语从句

总结 初级经济法重点总结下载党员个人总结TXt高中句型全总结.doc高中句型全总结.doc理论力学知识点总结pdf 好的：IF引导的条件状语从句 if引导的条件状语从句 if条件句:条件句用于陈述语气，表示假设的情况可能发生，其中 if 是“如 果”的意思。 用 法 例 句 ? 主句为一般将来时态，if从句We will stay at home if it rains tomorrow. 用一般现在时态(即主将从现)。 如果明天下雨，我将要呆在家。 ? 主句中含有情态动词，if从句If you finish your homework, you can go 用一般现在时态。 home now. 如果你做完了作业，你现在 可以回家了。 ? 主句为祈使句，if从句用一般Don’t jump into the river if you feel very 现在时态。 hot. 如果你感到很热，不要跳入河里。 ? 主句为过去将来时，if从句用If I were you, I wouldn’t do it like that.如 一般过去时态(如果涉及到be动果我是你，我就不会那么做的。 词，一律都用were)。此时，表If you gave me some money, I would be 达的是和现实相反的推测，用虚very happy. 如果你给我一些钱，我就会 拟语气。 很高兴的。 构 成 条件从句 主 句 时 态 If，一般现在时 主语，shall/will+动词原形 例 句 If he comes, he will take us to the zoo. 1) 用法: (1)条件状语从句通常由连词if引导，意为“如果、假如”，主句不能用be going to表示将来，而应该用shall，will。 If you leave now, you are never going to regret it. (错误) If you leave now, you will never regret it. (正确) (2)if “如果”，引导条件状语从句，主句用一般将来时，从句则用一般现 在时，如: If it rains tomorrow, I shan’t climb the hills. (3)另外，主句是祈使句或含有情态动词，从句也用一般现在时。如: Please call me if he comes next Sunday. Can you call the policeman if you are in the trouble. 注意 宾语从句中的if与条件状语从句if的区别。宾语从句中的if“是否” 相当于 whether，引导宾语从句，时态需根据语境确定。如果主句用一般现在时， 从句可以根据具体情况选用时态，如果主句用一般过去时，从句必须用过去式 的某种形式。 I don't know if it will rain tomorrow. 我不知道明天是否会下雨。 Our teacher said there was going to be a football match the next month.我们说 下月将有场足球比赛。 【边学边做】用括号内所给词的正确形式填空。 1. What will you buy if you ________(have)a lot of money? 2. If it ________(not snow)tomorrow, we will feel unhappy. 3. You mustn’t go to school if you ________(be)still in bed. 4. If he _______(be)at home at that time, he would know it. 5. Please show me the way if you ________(know)it. 6. You will hurt your teeth if you ________(eat)too much candy. 7. If you gave me a toy car, I _________(be)very happy. 8. I would get the prize if I _________(work)hard. 9(If she ______ (finish ) work early ,she ______(go) home. 10(If the weather______(be)fine，we_______(go)for a walk . 11. If I_____(have) time tonight ,I _______(finish) the book I’m reading. 12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable . 13. If it_______(rain),we______(stay) at home . 14.If she______(arrive) ,she _____(phone) me . 15. If he_____(call),tell him I’ll ring back . 二、用所给词的适当形式填空 1. If you ________(feel) tired, you _________ (have) to have a rest. 2. Where _____ he ____(see) the film if he _________(have) time? 3. If there ____ (be) fewer trees, there _______ (be) more pollution. 4. He ___ (dress) more casually if he ___ (not work) on weekends. 5. If Marcia _______ (live) alone, she _______ (keep) a pet parrot. 6. Lana _____ (buy) a new dress if the old one ____ (be) out of style. 7. The twins _______ (fight) if they__________ (argue). 8. I ______ (have) a bake sale if I ____ (need) money for education. 9. Peter ____ (send) me a beautiful souvenir if he ____(tour) Spain. 10. If Mr. Green _______ (say) I am hard- working, my parents ___ (feel) glad. 11. I ______ (go) to the beach if it________ (not rain) this week. 12. _____they ___ (have) a match if the P.E. teacher __ (be) busy? 13. He ____ (write) a letter to his grandparents if he ____ (get) his report card this week. 14. If she ______ (get) up late, she _____ (not catch) the early bus. 15. Peter ____ (major) in English if he ____(pass) the exams in Peking University. 二、完成句子 1. 他如果看电视太久了，他的父母会不高兴。 If he _____ TV too much, his parents ________ ______unhappy. 2. 如果明天不下雨，我会和你一起去公园的。 If it _____ ______tomorrow, I _____ go to the park ______you. 3. 如果他有空，他会帮助你的。 If he ____ ____, he ______ ____ you. 4. 如果Tom考试不及格，他就没有机会上高中了。 Tom ______have the _____to go to the high school if he ________the exams. 5. 你如果抄同学的作业就不能学好各门功课。 You _______ _____ good at all the subjects if you ______ the other students’ homework.