通常这些助动词不用于条件句中的if之后,然而以下情况例外。
A if you will/would常用于有礼貌的请求中,此时可用更有礼貌的形式would。
If you will/would wait a moment Ill see if Mr Jones is free.
请您稍候片刻,我看看琼斯先生是否有空。(请等候)
I would be very grateful if you would make the arrangements for me.
如果您能为我安排一下,我将不胜感激。
假如这种要求在当时的情况下通常都会提出,已成为套话,if you would+动词原形就常常单独使用。这表示说话人认为对方理所当然会照办。
If youd fill up this form.
请填好这张表。
(in a hotel) If youd just sign the register.
(在旅馆中)请在登记簿上签名。
(in a shop)If youd put your address on the back of the cheque.
(在商店里)请在支票的背面写下你的地址。
(in a classroom)If youd open your books.
(在教室里)请打开你们的书。
B 表示愿意的if+will/would适用于所有人称:
If hell listen to me Ill be able to help him.
如果他听我说,我就会帮助他。(如果他乐意听)
If Tom would tell me what he wants for his dinner Id cook it for him.
如果汤姆愿意告诉我他晚饭要吃什么,我就会做给他吃。(说话人的意思是说汤姆不愿告诉她。)如在这里使用wont时,则意味着拒绝:
If he won t listen to me I cant help him.
如果他不肯听我的话,我就不能帮他的忙。(如果他不愿听/如果他拒绝听)
If they wont accept a cheque well have to pay cash.
如果他们不愿接受支票我们就只能付现金。(如果他们拒收)
C Will 可以用来表示执意坚持(参见第230节B):
If you will play the drums all night no wonder the neighbours complain.
如果你一定要整夜敲鼓的话,那就难怪邻居抱怨。(要是你执意敲的话)
D if+would like/care 可以用来代替 if+want/wish,而且比后者有礼貌:
If you would like to come Ill get a ticket for you.
如果你想来,我就给你弄一张票。
If youd care to see the photographs Ill bring them round
如果你有兴趣看那些照片,我就带来。
If hed like to leave his car here he can.
如果他想把车停放在这里,他可以这样做。
但是,如果改写一下句子,使 would like没有宾语,就可以省掉 would:
If you like Ill get a ticket for you.
如果你喜欢,我就给你弄一张票。
但是说:
If youd like a ticket Ill get one for you.
(译文同上。)
If he likes he can leave his car here.
如果他愿意,他可以把车停放在这里。
但是说:
If hed like to leave his car here he can./ He can leave it here
if hed like to.(译文同上。)
E if+should可以用于条件句类型1,用来表示动作虽有可能实现但可能性不很大。它常和祈使句结合使用,而且主要用于 书面的说明中:
If you should have any difficulty in getting spare parts ring this number.
万一你买备件时遇到什么困难,请打这个电话号码。
If these biscuits should arrive in a damaged condition please inform the factory at once.
饼干运到时如有损坏,请立即通知本厂。
should可以位于句首而省略掉if:
Should these biscuits arrive
国际英语资讯:Spotlight: U.S. Navy leaders urged to do better amid deadly ship collisions
惊呆了:男子常年宿醉,因为肚子里会自动酿酒
体坛英语资讯:Mark Selby, Ding Junhui enjoy good start at Snooker World Open in Yushan
国际英语资讯:Japan, S.Korean lawmakers agree to work towards breaking stalemate, easing tensions amid str
How honest are you? 你诚实吗?
LV的母公司LVMH试图收购Tiffany
纹身墨水有害身体健康
国际英语资讯:3 dead, more than a dozen injured after buses collide in New York
婚恋网站须严格执行实名制 严打违法婚介
国内英语资讯:China punishes 5,419 officials in frugality campaign
国际英语资讯:Massive protests held in Japan to mark second anniversary of controversial security laws
国内英语资讯:Chinese FM gives full score to 1st 100 days of China-Panama diplomatic ties
体坛英语资讯:Poland smash Tunisia at FIVB Volleyball Mens World Cup
老人给孙子进行入园不吃亏培训 有人推你就咬他!
Latest 'endangered species' list published 最新“濒危物种”名单公布于众
国内英语资讯:CMC signs service agreement with 13 agencies
国际英语资讯:Greek parliament approves bill to accelerate asylum procedures
亚洲冰川将流失1/3 恐影响数百万人
国内英语资讯:China-Uzbekistan relations enter golden period of rapid development: Premier Li
苹果推出AirPods Pro无线降噪耳机,形似豌豆射手
昂山素季声讨若开邦侵犯人权的现象
哈里王子和梅根好事将近 欲请凯特王妃做伴娘
没听过三手烟?那你肯定不知道它的危害有多大!
国际英语资讯:Hamas says ready to resume dialogue with Fatah
国际英语资讯:Finnish authorities to help promote Alipay
国内英语资讯:China Focus: CPC to amend party constitution
国内英语资讯:China Focus: Xi stresses prevention, control of major risks
国内英语资讯:China highly values Macrons upcoming state visit: FM
美文赏析:自律,才能带来真正的自由
国际英语资讯:DPRK condemns latest U.N. Security Council press statement