怎么讲if引导的条件状语从句我要去私利试讲,课文中有一句if there is no rain,we will have no water to drink.这句话的语法点我怎么解释都感觉别扭,大家帮我想想应该怎解释这句的if引导的条件状语从

怎么讲if引导的条件状语从句我要去私利试讲,课文中有一句if there is no rain,we will have no water to drink.这句话的语法点我怎么解释都感觉别扭,大家帮我想想应该怎解释这句的if引导的条件状语从
怎么讲if引导的条件状语从句
我要去私利试讲,课文中有一句if there is no rain,we will have no water to drink.这句话的语法点我怎么解释都感觉别扭,大家帮我想想应该怎解释这句的if引导的条件状语从句,

怎么讲if引导的条件状语从句我要去私利试讲,课文中有一句if there is no rain,we will have no water to drink.这句话的语法点我怎么解释都感觉别扭,大家帮我想想应该怎解释这句的if引导的条件状语从
这句话很正常啊,就是一个普通的if引导的条件状从..
你参考下资料吧..
真实条件句用于陈述语气,假设的情况可能发生,其中 if 是如果的意思.
时态关系
句型： 条件从句 主句
一般现在时 shall/will + 动词原形
If he comes, he will bring his violin.
典型例题
The volleyball match will be put off if it ___.
A. will rain B. rains C. rained D. is rained
答案B.真实条件句主句为将来时,从句用一般现在时.
注意：
1） 在真实条件句中,主句不能用be going to表示将来,该用shall, will.
(错) If you leave now, you are never going to regret it.
(对) If you leave now, you will never regret it.
2） 表示真理时,主句谓语动词便不用shall (will) +动词原形,而直接用一般现在时的动词形式.
16.2 非真实条件句
1）时态：可以表示过去,现在和将来的情况.它的基本特点是时态退后.
a. 同现在事实相反的假设.
句型 ： 条件从句 主句
一般过去时 should( would) +动词原形
If they were here, they would help you.
b. 表示于过去事实相反的假设.
句型： 条件从句 主句
过去完成时 should(would) have+ 过去分词
If she had worked harder, she would have succeeded.
The rice would not have been burnt if you had been more careful.
If my lawyer had been here last Saturday, he would have prevented me from going.
If he had come yesterday, I should / would have told him about it.
含义：He did not come yesterday, so I did not tell him about it.
If he had not been ill and missed many classes, he would have made greater progress.
含义： He was ill and missed many lessons, so he did not make greater progress.
c. 表示对将来的假想
句型： 条件从句 主句
一般过去时 should+ 动词原形
were+ 不定式 would + 动词原形
should+ 动词原形
If you succeeded, everything would be all right.
If you should succeed, everything would be all right.
If you were to succeed, everything would be all right.
16.3 混合条件句
主句与从句的动作发生在不同的时间,这时主,从句谓语动词的虚拟语气形式因时间不同而不同,这叫做混合条件句.
If you had asked him yesterday, you would know what to do now.
（从句与过去事实相反,主句与现在事实相反.）
If it had rained last night (过去), it would be very cold today (现在).
16.4 虚拟条件句的倒装
虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略,再把were, should或had 移到从句句首,实行倒装.
Were they here now, they could help us.
=If they were here now, they could help us.
Had you come earlier, you would have met him
=If you had come earlier, you would have met him.
Should it rain, the crops would be saved.
=Were it to rain, the crops would be saved.
注意：
在虚拟语气的从句中,动词’be’的过去时态一律用"were",不用was, 即在从句中be用were代替.
If I were you, I would go to look for him.
如果我是你,就会去找他.
If he were here, everything would be all right.
如果他在这儿,一切都会好的.
典型例题
_____ to do the work, I should do it some other day.
A. If were I B. I were C. Were I D. Was I
答案C. 在虚拟条件状语中如果有were, should, had这三个词,通常将if省略,主语提前, 变成 were, should, had +主语的形式.但要注意,在虚拟条件状语从句中,省略连词的倒装形式的句首不能用动词的缩略形式.如我们可说 Were I not to do., 而不能说 Weren’t I to do.
16.5 特殊的虚拟语气词：should
1） It is demanded / necessary / a pity + that…结构中的主语从句的谓语动词要用should 加动词原形, should 可省略.
句型：
(1)suggested
It is (2)important that…+ (should) do
(3) a pity
(1)suggested, ordered, proposed, required, demanded, requested, insisted； + (should) do
(2)important, necessary, natural, strange
a pity, a shame, no wonder
(3)It is suggested that we (should) hold a meeting next week.
It is necessary that he (should) come to our meeting tomorrow.
2）在宾语从句中的应用
在表示命令、建议、要求等一类动词后面的从句中.
order, suggest, propose, require, demand, request, insist, command, insist + (should) do
I suggest that we (should) hold a meeting next week.
He insisted that he (should ) be sent there.
注意： 如suggest, insist不表示"建议" 或"坚持要某人做某事时",即它们用于其本意"暗示、表明"、"坚持认为"时,宾语从句用陈述语气.
The guard at gate insisted that everybody obey the rules.
判断改错:
（错） You pale face suggests that you (should) be ill.
(对) Your pale face suggests that you are ill.
(错) I insisted that you ( should) be wrong.
(对) I insisted that you were wrong.
3）在表语从句,同位语从句中的应用
在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气,即（should）+动词原形.
My idea is that we (should) get more people to attend the conference.
I make a proposal that we (should) hold a meeting next week.

1. 这课主要学习由 if 引导的条件状语从句中的“主将从现”现象，即主句为将来时态时，它所引导的条件状语从句使用一般现在时表达将来的意味，这时主句和从句所表达的时态在意义上仍然保持一致。
例如：
If he goes to England , he will have to learn English.
如果他要去英格兰，他将不得不学英语。
If it i...

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1. 这课主要学习由 if 引导的条件状语从句中的“主将从现”现象，即主句为将来时态时，它所引导的条件状语从句使用一般现在时表达将来的意味，这时主句和从句所表达的时态在意义上仍然保持一致。
例如：
If he goes to England , he will have to learn English.
如果他要去英格兰，他将不得不学英语。
If it is fine tomorrow, we will have a picnic somewhere.
如果明天天气好，我们就到什么地方野餐去。
这里 if 所引导的是真实条件句（ real conditional ），即所假设的条件有可能成为现实，表达假定所假设的条件实现时会出现的情况或会采取的行为。有时，我们可以使用并列结构的祈使句来表达这种类型的条件句。
例如：
If you set your alarm clock, you won't oversleep.
如果你上闹钟，你就不会睡过头了。
Set your alarm clock, and you won't oversleep.
If you give him an inch, he will take a mile. 他会得寸进尺。
Give him an inch, and he will take a mile.
If you don't give him some food, he will starve.
如果你不给他一点吃的，他就会饿死。
Give him some food, or/else he will starve.
在阅读英文文章时，我们有可能看到这样的句子：
If my father will give me permission, I shall spend a few months abroad.
如果我父亲同意，我将在国外待几个月。
If you will take the trouble to read his letter carefully, you will see what he means.
如果你肯花一些时间来认真读他的信，你就会明白 他是什么意思了。
在 if- 分句中中用“ will ＋动词原形”并不单纯表示将来意义，这里的 will 是个表示“意愿”的情态动词，相当于 be willing to （愿意）。
要注意这种带“ will ＋动词原形”的 if- 分句在某些场合是不可以随便用的，比如我们可以说：
If he gets my letter in time, he'll be able to change his plans.
如果他及时收到我的信，他就能改变他的计划。
却不可以说成：
If he will get my letter in time, he'll be able to change his plans.
另外，在 if- 分句中还可能使用“ would ＋动词原形”的结构，这种用法还是表示“意愿”，常用于表示客气的请求，这时主句动词既可以用 will/ shall ＋动词原形，也可以用 would/ should/ could/ might ＋动词原形。
例如：
If you would try Italian food, you would like it.
如果你愿意尝尝意大利食物，你会喜欢它的。
If you would reserve the seats, we would be sure of a comfortable journey.
如果你愿意订座，我们将肯定会有一个舒适的旅程。
2. be ＋ doing 形式： 用现在进行时态表达将来意味，主要意义是表示按计划、安排即将发生的动作，常用于位置转移的动词，如 go ， come ， leave ， start ， arrive 等，也可用于其它动态动词。
例如：
The president is coming to the UN this week. 总统这周将到联合国来。
We are moving to a different hotel the day after tomorrow. 我们后天将换一家宾馆。
在现在英语中，有相当多的动态动词都可以用现在进行时表示将来。
例如：
Dinner is ready. We ' re having fish for dinner. 晚饭好了，今晚我们吃鱼。
I ' m spending my holidays in Singapore this year. 今年我要去新加坡度假。
Tom isn ' t finishing his high school until next year. | 汤姆明年才高中毕业。

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