華閱文章網以if開頭的英語句子10句
a. 與現在事實相反的假設
條件從句 主句
一般過去時（be用were） should(would)等 +動詞原形
例如：If they were here, they would help you. 如果他們在這兒，會幫助你的。
含義：They are not here, they can't help you.
b. 與過去事實相反的假設
條件從句 主句
過去完成時 should(would)等+ have+ 過去分詞
例如：If he had come yesterday, I should / would have told him about it.如果他昨天來的話，我會把這件事告訴他的。
含義：He did not come yesterday, so I did not tell him about it.
c. 表示對將來不大可能發生的事情的假想
條件從句 主句
一般過去時 should/would等 + 動詞原形
were+ 不定式
should+ 動詞原形
例如：If you succeeded, everything would be all right. 如果你將來成功了，一切都會好的。
If you should succeed, everything would be all right.
If you were to succeed, everything would be all right.
含義：You are not likely to succeed, everything will be what it is now.
if從句的三種用法
1、主將從現 （主句為一般將來時，從句為一般現在時）；eg:If it rains（從句） ，I will stay at home（主句）.=I will stay at home if it rains.2、主句含有情態動詞 （must、may、can etc.）從句為一般現在時；eg:If you drive too fast ,you may have an accident.=You may have an accident if you drive too fast3、主句為祈使句，從句要用一般現在時態；eg:Don't play computer games if you don't finish your homework.備注：1、If 于句首時中間用逗號隔開，主句后不用逗號.2、if 可用unless（除非。）
替換.unless= if。not。
3、注意虛擬語氣 主句和從句都為一般過去式eg:If I was a bird ,I could fly.（事實我不可能是鳥）。
if you英文版 最好聽的
歌名：If you改編/翻唱/填詞：十七Sometimes it's hard to define有時候很難分辨If falling stars are hiding in your eyes你眼里是不是藏了星星Just watching you made me cry只是看著你就會紅了眼眶Cause now I know you'll never ever get off my mind因為現在我知道你會永遠在我心里I never thought all those beautiful words can't describe我從來沒想過 即使是最美麗的語言 也無法描繪出A little of your kindness, a bit of your light你萬分之一的美好 甚至最細微的光芒There's nothing I can't give up for your smile為了你的笑沒什么不能放棄的Whatever it takes, I'll make it alright.我愿意用一切去交換那個笑容If you If youWhy the world is so big and I'm so small為什么世界這么大而我這么渺小Wanted to give you more but I'm not that strong想給你更多更多卻不夠強大If you If youYou are the one and only precious I care你是我最最珍惜的唯一I see your eyes telling me there's nothing to fear你的眼神像是在告訴我要無所畏懼I'm right here我就在這里Would you see你看得到嗎Would you hear你聽得到嗎Remember back in the day記得那些日子They tried to knock you down and wreck your faith他們試著擊倒你 摧毀你的信念Is it just too hard to say那些苦澀是不是太難說出口Cause no one could ever really feel it in your way.因為永遠也不會有人可以感同身受The sun goes down did you need to find a place to hide當天色漸暗 你也想找個地方躲一躲嗎When the road is too long, the light is too bright.當路太漫長 燈光太刺眼Until whenever I'll be by your side不管到什么時候我都會在你身邊Wherever you go, I'll break all those nights.不管你去哪兒我都會為你打破黑夜If you If youWhy the world is so big and I'm so small為什么世界這么大而我這么渺小Wanted to give you more but I'm not that strong想給你更多更多卻不夠強大If you If youYou are the one and only precious I care你是我最最珍惜的唯一I see your eyes telling me there's nothing to fear你的眼神像是在告訴我要無所畏懼I'm right here我就在這里Would you see你看得到嗎Would you hear你聽得到嗎The planets are spinning world is changing time is flying but I promise I will always stay星球在轉動 世界在變化 時間在流逝 但我承諾我會一直在這里Any danger any gossip anything they might say will never take me away任何危險 任何流言蜚語 都不會將我帶離你身邊Hey youDon't be afraid, don't worry about a thingHey， 別害怕，什么都別擔心I will take you home.我會 帶你回家。
英語IF虛擬語氣的用法
1、提出將來會發生的事：
主句：主語+would/should/might/could+動詞原形；
從句：should+動詞原形/were to+動詞原形。
例句：If he should go to Harvard University, he would make full use of his time.
如果他要上哈佛大學的話，他就會充分利用他的時間了。
2、提出現在的條件：
主句：主語+would/should/might/could+動詞原形；
從句：動詞過去式。
例句：If he studied at this school, he would know the enviornment around the school very much.
如果他在這所學校學習的話，他會很了解周邊環境。
3、提出過去的未發生的條件：
主句：主語+would/should/might/could have+動詞過去分詞；
從句：had+動詞過去分詞。
例句： If I had read the book, I would have told you about it.
我如果看過本書，我會把內容告訴你了。
擴展資料
if短語的用法
1、as if
1）釋義：猶如，好似
2）例句
As if it never happened.
如果它從來沒有發生過。
2、if any
1）釋義：若有的話；即便要
2）例句
What action, if any, do you take?
若有的話，你會采取什么措施？
3、if so
1）釋義：如果是這樣的話；要是這樣
2）例句
If so you have not yet forgiven.
如果是這樣，你還未能學會寬恕。
4、if only
1）釋義：只要；要是…多好
2）例句
If only I could go with you.
要是我能和你一起去就好了
5、if ever
1）釋義：假如，要是；如果真有（我當真）
2）例句
If ever we do not feel like eating, do not force us.
當我們不想吃飯的時候請不要強迫我們。
6、if at all
1）釋義：如果某事真會發生的話；如果某人真要做某事的話
2）例句
How, if at all, should the Department of Homeland Security be restructured?
如果要重組國土安全部的話，應該如何重組？
7、if and when
1）釋義：萬一，如果；只有當…之時
2）例句
Be unique if and when replicated to another.
如果是獨一無二的，當復制到另一臺。
IF語句怎么寫
createtable倉庫表（倉庫號intnotnull，數量intnotnull）select*from倉庫表insert倉庫表values(12,0)insert倉庫表values(13,0)//我要以倉庫號賦值取數據，如果是倉庫號為A，則把a,c取出來，如果是倉庫號為B，//則只取出b.即倉庫號為A的把所有數據都取出來，B則只要大于0的數據.sql應該怎么寫呢？ 倉庫號from倉庫表where倉庫號 '所查詢出的記錄號為：'+Convert()if(@number=13)select*from倉庫表where倉庫號if(@number=12)select倉庫號from倉庫表where倉庫號print'此次查詢沒有查到記錄'以上已經幫你測試好了，拿過來就可直接用了。
以If開頭的英語諺語
If you want to watch more,please go upstair.欲窮千里目，更上一層樓。
If you venture nothing ,you will have nothing.是典型的虛擬語氣句型結構（主將從現） If you make an ass of yourself,don't complain if peopie criticize you. If you sell the cow,you sell her milk too.這兩句應該都是并列關系，時態可以保持一致吧
英語if用法
選：B. will rain , doesn't rain
因為： I don't know if it ------tomorrow. “我不知道明天是否會下雨”，if 引導賓語從句，表示：“是否”， “是否會下雨”要用 “if it will rain”。
if it -----,we'll go to the Great Wall. 意思是：“如果明天不下雨，我們將去長城”，if 引導條件狀語從句，表示：“如果”，在表示將來的條件狀語從句中，謂語動詞用一般現在時態，所以用“doesn't rain ”。因此綜合2個空格考慮，應該選擇B.
祝您進步。
