| 单词 | if |
| 释义 | conjunction | noun ifif1 /ɪf/ ●●● S1 W1 conjunction 1used to introduce a phrase when something else depends on that action and situation: We’ll have to leave Monday if it snows today. If you wash my car, I’ll give you $10. What would happen to your children if you died in an accident? You can come with us if you want. I want to get back by five o’clock if possible (=if it is possible). Taste the soup and add salt if necessary (=if it is necessary).if somebody/something were/was to do something If I were to offer you $1,000 would you accept it? I think I can fix it now. If not, I’ll come back tomorrow. Is the book available, and if so (=if the answer to the question is “yes”), where? We’ll deal with that problem if and when it arises.THESAURUSas/so long as – used when saying that something is true only if someone does something or if something happens: Hiking in the mountains is safe as long as you follow some basic rules.provided/providing (that) – provided that and providing that mean the same as as long as but are more formal: All students can participate provided that they have their own equipment.on condition that – used when saying that something is true only if someone agrees to do something: They offered him the job on condition that he moved to Chicago.unless – used when saying what will be true if someone does not do something or if something does not happen: You won’t pass your final exams unless you study hard.in case – used for saying what might happen, which someone wants to be prepared for: She did not think it would rain, but she took her umbrella just in case it did.even if – used when saying that something will still be true despite another action or situation: Even if we leave now, we’ll still be late.whether or not – used when saying that it does not matter if something happens or not, or if something is true or not: Her comments are always interesting, whether or not you agree with what she says.or – used for saying what the bad result will be if someone does not do something or if something does not happen: Stop that or I’ll tell Mom.otherwise – otherwise means the same as or but is more formal and is used to start a separate sentence: He had better hurry up. Otherwise, we’ll be late.2used to mention a fact, situation, or event that someone asks about, or is not certain about SYN whether: Do you know if we have to work on Christmas Eve? I wonder if Matt’s home yet. → see Grammar at whether3used when you are talking about something that always happens in a particular situation: If I drink too much coffee, I can’t sleep. The plastic will melt if it gets too hot.4used when saying what someone’s feelings are about a possible situation: I’m sorry if I upset you. I don’t care if my boss fires me – I’m leaving.5used when making a polite request: Would you mind if I used your phone? If you can wait a moment, I’ll find your papers for you.6if I were you spoken used when giving advice and telling someone what you think he or she should do: If I were you, I’d sell that car.7if anything used when adding a remark that changes what you have just said or makes it stronger: It was warm in L.A. If anything it was a little too warm.8if it weren’t for something/somebody used for mentioning something or someone that prevents something from happening now: If it weren’t for my kids being sick, I’d come and help you.9if it hadn’t been for something/somebody used for mentioning something or fsomeone that prevented something from happening in the past: If it hadn’t been for her quick actions, we’d all have been killed.10if only a)used to give a reason for something, although you think it is not a good one: Just call her, if only to say you’re sorry. b)used to express a strong wish, especially when you know what you want cannot happen: If only I could be 18 again!11spoken used during a conversation, speech, etc. when you are trying to make a suggestion, change the subject, or interrupt someone else: If I could just interrupt for a minute, I have a question.12if ever used for emphasizing that something is particularly true in the case you are mentioning: If ever a family deserved some good luck, they do. If there ever was a time when we needed help, it’s now.13used when you are adding that something may be even more, less, better, worse, etc. than you have just said: Brian rarely, if ever, goes to bed before 3 a.m. Her needs are just as important as yours, if not more so.14used when adding one criticism of a person or thing that you generally like SYN though: The car is beautiful and fast, if a little expensive.15if somebody’s..., (then) I’m... spoken used to say that you do not believe what someone has said about himself or herself: If Harry’s a professional ice skater, I’m the Pope. [Origin: Old English gif] → see also as if.../as though... at as2 (4), even if at even1 (4) conjunction | noun ifif2 noun [countable usually plural] informal 1a possibility or condition: There are too many ifs in this plan.2no ifs, ands, or buts spoken used to say that someone is not allowed to disagree with you |
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