What's the difference between never and previously?

Never


Definition:

  • (adv.) Not ever; not at any time; at no time, whether past, present, or future.
  • (adv.) In no degree; not in the least; not.

Example Sentences:

  • (1) We will never give up our hope for peace,” added Netanyahu.
  • (2) Both condemn the treatment of Ibrahim, whose supposed offence appears to have shifted over time, from fabricating a defamatory story to entering a home without permission to misleading an interviewee for an article that was never published.
  • (3) The peak molecular weight never reached that of a complete 2:1 complex.
  • (4) The latest story will show Bridget more "grown up" but she is "never going to change really".
  • (5) Critics say he is unelectable as prime minister and will never be able to implement his plans, but he has nonetheless pulled attention back to an issue that many thought had gone away for good.
  • (6) The curious thing, it seems to me, is that she was never criticised for it.
  • (7) … or a theatre and concert hall There are a total of 16 ghost stations on the Paris metro; stops that were closed or never opened.
  • (8) I’ve never really had that work versus life thing; it’s all part of the same canvas.
  • (9) My father has never met him but has a different view.
  • (10) Only 47 of the patients had received salicylates as the first drug and 18 had never had them at all.
  • (11) Never become so enamored of your own smarts that you stop signing up for life’s hard classes.
  • (12) In order to maintain its activity, the enzyme was always stored in 1.0-ml aliquots at temperatures below -20 degrees C and each aliquot when thawed was used immediately; any left over enzyme was never reused.
  • (13) Single injections never produced more than one coupled pair in P20 or older rats.
  • (14) I never had any doubt that the vast majority of people engaged in "business" are not the exploiters but the exploited.
  • (15) One important consequence of the conservative mode of replication is that cellular enzymes never gain access to the reovirus genome but only to its ssRNA precursors.
  • (16) I never accuse a student of plagiarizing unless I have proof, almost always in the form of sources easily found by Googling a few choice phrases.
  • (17) Journalists should never be a propaganda arm of any government – not in peace and never in war.
  • (18) They were never a band, as they were often called, they were artist-activists.
  • (19) Furthermore, non-coordinate expression of DR and DQW1 was present in 8 out of 40 carcinomas, with the proportion of DQW1 positive epithelium always being less than that of DR. Carcinomas exhibiting non-coordinate expression were never well differentiated; there was no relationship with the extent of the inflammatory infiltrate.
  • (20) The Ibiza Rocks hotel is aimed at a young clientele who'd never make it into the VIP section of Pacha.

Previously


Definition:

  • (adv.) Beforehand; antecedently; as, a plan previously formed.

Example Sentences:

  • (1) Previous use of the drug is found in more than 50 per cent of the patients, and it was often followed by a neglected side-effect.
  • (2) A series of human cDNA clones of various sizes and relative localizations to the mRNA molecule were isolated by using the human p53-H14 (2.35-kilobase) cDNA probe which we previously cloned.
  • (3) Since fingernail creatinine (Ncr) reflects serum creatinine (Scr) at the time of nail formation, it has been suggested that Ncr level might represent that of Scr around 4 months previously.
  • (4) The authors have presented in two previous articles the graphic solutions resembling Tscherning ellipses, for spherical as well as for aspherical ophthalmic lenses free of astigmatism or power error.
  • (5) Seventeen patients (Group 1) had had no previous surgery, while 13 (Group 2) had had multiple previous operations.
  • (6) Clinical and roentgenographic criteria could not discriminate between patients with and without pneumonia, confirming the findings of previous investigations.
  • (7) Previous attempts to purify this enzyme from the liquid endosperm of kernels of Zea mays (sweet corn) were not entirely successful owing to the lability of partially purified preparations during column chromatography.
  • (8) The taxonomic relationship of strains H4-14 and 25a with previously described Xanthobacter strains was studied by numerical classification.
  • (9) Using monoclonal antibodies directed against the plasma membrane of Madin-Darby canine kidney (MDCK) cells, we demonstrated previously that a glycoprotein with an Mr = 23,000 (gp23) had a non-polarized cell surface distribution and was observed on both the apical and basolateral membranes (Ojakian, G. K., Romain, R. E., and Herz, R. E. (1987) Am.
  • (10) Because cystine in medium was converted rapidly to cysteine and cysteinyl-NAC in the presence of NAC and given that cysteine has a higher affinity for uptake by EC than cystine, we conclude that the enhanced uptake of radioactivity was in the form of cysteine and at least part of the stimulatory effect of NAC on EC glutathione was due to a formation of cysteine by a mixed disulfide reaction of NAC with cystine similar to that previously reported for Chinese hamster ovarian cells (R. D. Issels et al.
  • (11) We have previously shown that serotonin is present in secretory granules of frog adrenochromaffin cells; concurrently, we have demonstrated that serotonin is a potent stimulator of corticosterone and aldosterone secretion by adrenocortical cells.
  • (12) As the percentage of rabbit feed is very small compared to the bulk of animal feeds, there is a fair chance that rabbit feed will be contaminated with constituents (additives) of batches previously prepared for other animals.
  • (13) In contrast to previous reports, these tumours were more malignant than osteosarcomas and showed a five-year survival rate of only 4-2 per cent.
  • (14) The data from this experience as well as others previously reported can yield prognostic indicators of survival in cases of accidental hypothermia.
  • (15) The previous year, he claimed £1,415 for two new sofas, made two separate claims of £230 and £108 for new bed linen, charged £86 for a new kettle and kitchen utensils and made two separate claims, of £65 and £186, for replacement glasses and crockery.
  • (16) Some S-100 reactive cells previously interpreted as tumour cells were refound in a few tumours.
  • (17) The results of our microscopic model confirm that the continuum hypothesis used in our previous macroscopic model is reasonable.
  • (18) Male sex, age under 19 or over 45, few social supports, and a history of previous suicide attempts are all factors associated with increased suicide rates.
  • (19) We present these cases and review the previously reported cases.
  • (20) These data indicate that RNA faithfully transfers "suppressive" as well as "positive" types of immune responses that have been reported previously for lymphocytes obtained directly from tumour-bearing and tumour-immune animals.