单词	ascertain
释义	ascertainas‧cer‧tain /ˌæsəˈteɪn $ ˌæsər-/ ●○○ verb [intransitive, transitive] Word Origin WORD ORIGINascertain Origin: 1500-1600 Old French acertainer, from certain Verb Table VERB TABLE ascertain Simple Form Present I, you, we, they ascertain he, she, it ascertains Past I, you, he, she, it, we, they ascertained Present perfect I, you, we, they have ascertained he, she, it has ascertained Past perfect I, you, he, she, it, we, they had ascertained Future I, you, he, she, it, we, they will ascertain Future perfect I, you, he, she, it, we, they will have ascertained Continuous Form Present I am ascertaining he, she, it is ascertaining you, we, they are ascertaining Past I, he, she, it was ascertaining you, we, they were ascertaining Present perfect I, you, we, they have been ascertaining he, she, it has been ascertaining Past perfect I, you, he, she, it, we, they had been ascertaining Future I, you, he, she, it, we, they will be ascertaining Future perfect I, you, he, she, it, we, they will have been ascertaining Examples EXAMPLES FROM OTHER DICTIONARIES A doctor should examine the patient to ascertain where the pain is localized. As far as we have been able to ascertain, our client is not involved in anything illegal. Read labels to ascertain the amount of fats in processed foods. The case remains a mystery. The police were never able to ascertain the true facts. The pathologist ascertained that the victim had died from a gunshot wound. EXAMPLES FROM THE CORPUS Because of the nature of the sample this study could not ascertain the views of residents themselves. Have you ascertained the strength and consistency of each symptom? He had previously ascertained that there were at least two aircraft with similar radio fits and noted their positions. It is not always easy to ascertain the source of a particular item of income. The reason was that it was not at that time ascertained that those materials were definitely to be used. Try to ascertain the financing techniques used by your own country in its international transactions with the rest of the world. Unfortunately, since there are so many possible explanations, the correct one is most difficult to ascertain. With Bulstrode resigned from the hospital board, Dorothea summons Lydgate for advice and also to ascertain the truth. Thesaurus Longman Language Activatorsomeone who cheats► check to do something in order to find out whether something is really true or correct: · "Are you sure this is the right phone number?" "Yes, I've just checked."· You'd better check the figures one more time - we don't want any mistakes.check that: · I'll just check that I locked the door.· Check that the meat is cooked thoroughly before serving it.check if/whether: · Before your trip, check if your insurance covers you abroad.check to see if/whether: · Let's check to see if she's OK. ► check out to make sure that something, especially something that someone else has told you, is actually true: check out something: · We got in touch with the bank to check out the suspect's story.check something out: · What he said didn't seem quite right, so I decided to check it out. ► make sure/make certain to check that a situation is really the way you want or expect it to be: · I don't think Jo's back yet, but you can knock on her door just to make sure.make sure/make certain (that): · Make certain the car is in good condition before you sign the rental agreement.· I phoned the hotel to make sure that they had reserved a room for us. ► double-check to check something a second time, so that you are completely sure: · "Did you switch the heating off?" "Yes, I double-checked."· I don't think I made a mistake. I checked and double-checked all my calculations.double-check that: · Double-check that the computer file was properly copied. ► verify formal to officially check a fact or statement and show that it is correct: · You can verify the facts in the report by calling his office.verify that: · Doctors have verified that the injury was indeed work-related. ► confirm to check that an arrangement you have made has happened or is still going to happen: · Have you called to confirm your flight yet?confirm that: · Let me just confirm that the money has arrived in your account. ► ascertain formal to find out if a fact that you think is true is really true: ascertain something: · The case remains a mystery. The police were never able to ascertain the true facts.ascertain that: · The pathologist ascertained that the victim had died from a gunshot wound.ascertain how/when/why etc: · A doctor should examine the patient to ascertain where the pain is localized.ascertain: · As far as we have been able to ascertain, our client is not involved in anything illegal. Collocations COLLOCATIONS FROM THE CORPUSADVERB► how · It is up to him to ascertain how far he wishes to travel and by what route.· Readers should ascertain how their own central bank defines money supply.· In particular, more research is needed to ascertain how the voice of the consumer may best be heard.· It was impossible to ascertain how many of the boats moored in the harbour over the weekend were local.· The real difficulty is in each case to ascertain how far such implications extend. NOUN► fact · The simplest inquiry by the hon. Gentleman would have ascertained that fact.· In the Chamber of Deputies a resolution was introduced to make an investigation of the affair to ascertain the facts.· If the complex number c is in the white region, then there is an algorithm for ascertaining that fact.· Gandhi took pains to ascertain all the facts.· If we suspect that this complex number actually lies on the unit circle, we can not necessarily ascertain this fact. VERB► try · We have not yet tried to ascertain the amount of information about government and politics that the respondents actually have.· There are a number of areas where problems are caused in trying to ascertain the appropriate standard of care for the plaintiff.· They tried to ascertain news of the tsar and his family, but to no avail.· If I were interviewing a new act, I would try to ascertain their sheer punishment factor.· He confirmed officers were still trying to ascertain what had been taken. formal to find out something SYN  establish:  A postmortem was ordered to try to ascertain the cause of death.ascertain whether/what/how etc Tests were conducted to ascertain whether pollution levels have dropped.ascertain that Police had ascertained that the dead man knew his killer.ascertain something from somebody/something You should ascertain the level of insurance cover from the car rental company.—ascertainable adjectiveRegisterAscertain is used mainly in formal or technical contexts. In everyday English, people usually say find out:· We need to find out exactly what happened before we jump to any conclusions.
随便看	predestination predestined predetermination predetermine predetermined predeterminer predicament predicate predicative predicatively predict predictability predictable predictably prediction predictive predictive text predictor predilection predispose predisposed predisposition predominance predominant predominantly

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