"would seem improbable" is a correct and usable phrase in written English.
It means that something appears unlikely or difficult to believe. It is often used to express doubt or uncertainty about a situation. Example: Despite all the evidence, it would seem improbable that the accused would commit such a heinous crime.
It would seem improbable that they should have nothing to say about what they and their regal husbands were doing.
In fact, the story of the CIA's involvement in Hollywood is a tale of deception and subversion that would seem improbable if it were put on screen.
Given the state of the housing market, the sudden appearance of a white-knight developer would seem improbable for now, and it may be awkward to attract new members for a club that will eventually be sold or possibly risks bankruptcy.
Although biogenic gas from contamination is always a possibility, the samples were fresh shales in which internal contamination would seem improbable.
It would seem improbable, but we happen to be in one of the suavest international hotels here, which with its internet access and bona fide Coca Cola (as opposed to the Cuban own-brand Tu Cola) is something of a tourist haven.
It would seem improbable that the same change would be selected for in completely divergent hosts unless it conferred a significant advantage in each.
The latter suggestion would seem particularly improbable, given that the currently governing parties first came to power in 2009 on the back of a violent "Twitter revolution" following eight years of Kremlin-friendly Communist Parulerule.
At that stage, it would have seemed improbable that, within little more than a decade, there would be two actors dressed up as Hitler in London musicals.
Such a lack of success would have seemed improbable at the time of the gambling scandal.
The appointment of a minority officer would have seemed improbable a year ago, says Eric Adams, a co-founder of 100 Blacks in Law Enforcement Who Care.
Regulations that still make it virtually impossible to sell unrated bonds in America are also a boon.All this would have seemed improbable only a couple of years ago, when talk abounded of reforming ratings agencies and diminishing their role.
