if引导的条件状语从句讲解和练习(答案)

文档鉴赏 条件状语从句条件状语从句 一 一 条件状语从句通常由条件状语从句通常由 if 如果 如果 unless 除非 除非 as long as 只要 引导 只要 引导 例如 If it rains tomorrow we won t go to the park 如果明天下雨 我们就不去公园了 Unless weather stops me I go for a walk every 我每天都会去散步 除非遇上坏天气 Our parents will be pleased with our performance as long as we try our best 小试牛刀 小试牛刀 1 只要我们竭尽全力 父母就会满意我们的表现 Our parents will be pleased with our performance we try our best 2 如果人人为保护环境做出贡献 世界将会变得更美好 to protecting the environment the world will become much more beautiful 二 二 if 引导的条件状语从句引导的条件状语从句 1 if 从句 祈使句 的句子 其实 if 作为一个连词 主句也可以是其他形式的句子 例如 If you want to go please let me know If the green light isn t on wait for a minute 2 祈使句 and or 陈述句 在意思上相当于一个带有条件状语从句的复合句 注意 A 祈使句 and 陈述句 可以转化为 if 引导的肯定条件状语从句 而且主语是第二人称 B 祈使句 or 陈述句 可以转化为 if 引导的否定条件状语从句 而且主语是第二人称 例如 Study hard and you will pass the exam If you study hard you will pass the exam Hurry up or you ll be late If you don t hurry up you ll be late 考题 2010 重庆中考 Work hard you may catch up with your classmates soon A orB butC andD yet 思路解析 思路解析 本句是 祈使句 and 的句型 句意为 努力学习 你会很快赶上其他同学的 and 在句中表示承接 关系 所以选 C 项 答案 C 黑色陷阱 黑色陷阱 本题的陷阱是句型 本句型区别于 祈使句 or 这个句型的含义是 不然的话 否则 绿色通道 绿色通道 祈使句后面既可以加 and 也可以加 or 所以要全面分析句意 再作决定 小试牛刀 小试牛刀 用 if 连接下列句子 1 Go to bed early and you will have a good rest 2 Hurry up or you ll miss the bus 三 三 if 从句与主句具有以下特点 从句与主句具有以下特点 1 If 从句中用一般现在时 表示未来的一种条件 从句中可以加时间状语 从句中用一般现在时 表示未来的一种条件 从句中可以加时间状语 e g If you can t come tomorrow we can hold the party a little later 明天你如果不能来 我们可迟一点举行宴会 文档鉴赏 If it doesn t rain tomorrow we ll go to the Great Wall 明天如果不下雨 我们就去长城 2 当 当 if 表示未来的条件时 主句中用一般将来时 从句用一般现在时 即表示未来的条件时 主句中用一般将来时 从句用一般现在时 即 主将从现主将从现 表示如果某种条件存 表示如果某种条件存 在 就有可能在 就有可能 不可能发生什么事情 不可能发生什么事情 e g If you don t get up early you will be late for school 你如果不早点起床 上学就会迟到 If I play games on it it will go wrong 如果我用它玩游戏 它就会坏掉 3 if 从句可放在主句前或主句后 从句置于主句前时 须用逗号与主句隔开 反之则不用逗号 从句可放在主句前或主句后 从句置于主句前时 须用逗号与主句隔开 反之则不用逗号 e g If it s fine tomorrow we can go out 如果明天天气好 我们就能出去 She will be happy if she joins the party 如果她参加聚会她会很开心的 I ll ask the teacher for help if I don t understand 如果我不懂我会求助老师的 三 注意三 注意 if 引导的条件状语从句和宾语从句的区别引导的条件状语从句和宾语从句的区别 if 可以用来引导宾语从句也可以用来引导条件状语从句 主要是要弄清 if 引导从句的时态 if 在引导 宾语从句时 意为 是否 要根据实际情况来确定时态 而 if 在引导条件状语从句时意为 如果 假设 要 用一般时代替将来时 即 主将从现 e g I want to know if he will come here tomorrow 我想知道他明天是否到这儿来 if 在上句引导的是宾语从句 从句中有很明显的表将来的时间状语 tomorrow 所以 if 从句要用一般将来时 e g If it rains tomorrow we ll put off the sports meeting 如果明天下雨 我们就推迟运动会 if 在上句引导的是条件状语从句 尽管从句中也有表将来时的时间状语 tomorrow 从理论上讲也应该用一般 将来时 但是在 if 引导的条件状语从句中要用一般现在时代替一般将来时 故从句谓语用 rains 而不用 will rain 二 典题分析二 典题分析 1 2010 上海 We will have no water to drink we don t protect the earth A until B before C though D if 答案 D 解析 if 引导条件状语从句 表示 如果 意思是如果我们不保护地球 我们将会没有水喝 2 2011 重庆 We will plant trees tomorrow and I don t know Tom will come and join us A if B which C what D where 答案 A 解析 if 引导宾语从句 表示 是否 意思是我们明天将会去植树 但是我不知道 Tom 会不会去 3 Do you know if finished the work Not yet If he he will give me a call A he s will finish B he ll finishes C he s finishes D he ll will finish 答案 C 解析 问句的 if 引导宾语从句 表示 是否 从句要用陈述语序 从答句 Not yet 中可以看出从 句应该用现在完成时态 答句的 if 引导状语从句 要遵循主将从现的规律 文档鉴赏 练习练习 一 用一 用 if 连接下面的句子 连接下面的句子 1 You do not understand the article Ask your teacher 2 You want to know more about it Please call your teacher 3 Tell him to make a phone call to me He will come here tomorrow 4 You want to go Please tell me 5 Look at our website The camera does not work 二 用所给的提示词组成一个二 用所给的提示词组成一个 if 引导的条件状语从句 引导的条件状语从句 1 be tired have a rest Tom 2 not go to bed early feel sleepy you 3 become unhealthy not eat vegetables children 4 not listen to the teacher not study well I 5 fall behind others in studying spend too much time on the games Da Wei 三 单项选择 三 单项选择 1 You are sure to pass the exam you study hard A if B though C that D since 2 I ll go to see the film with you I have time this evening A whether B so C if D when 3 you study harder you ll never pass the final exam A If B Until C Unless D Except 4 We ll stay at home if it this afternoon A rain B rains C to rain D raining 5 We will go to the Great Wall if it tomorrow A won t rain B isn t raining C rained D doesn t rain 文档鉴赏 6 I don t know if he He will come if it A comes won t rain B will come doesn t rain C comes doesn t rain D will come won t rain 7 Do you know what time A the train leave B does the train leave C will the train leave D the train leaves 8 Do you think if an English film tomorrow night A is there B there is going to have C there is going to be D will there be 9 Will you please tell me A where Pudong Airport is B how far Pudong Airport was C how can we get to Pudong Airport D when was Pudong Airport built 10 Mike wants to know if a picnic tomorrow Yes But if it we ll visit the museum instead A you have will rain B you will have will rain C you will have rains D will you have rains 11 Why didn t Nick come to school yesterday he was ill A After B Where C When D Because 12 This box is heavy I can t carry it A too to B so that C very that D too that 13 I don t know he still lives here A where B what C when D whether 14 Do you know if he to play basket ball with us I think he will come if he free tomorrow A comes is B comes will be C will come is D will come will be 15 In the zoo if a child into the water and can t swim the dolphins may come up him A will fall to help B falls to help C will fall help D falls helping 16 In the bookshop a reader asked the shop keeper Who Moved My Cheese was an interesting book A thatB howC whatD if 17 I want to know you have a brother A if B that C those D them 18 We will go hiking if it tomorrow A will be fine B is fine C be fine D is gong to be fine 19 Mayb