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The English modal verbs are a subset of the English auxiliary verbs used mostly to express modality (properties such as possibility, obligation, etc.). They can be distinguished from other verbs by their defectiveness (they do not have participle or infinitive forms) and by their neutralization (that they do not take the ending -(e)s in the third-person singular).
The principal English modal verbs are can, could, may, might, shall, should, will, would, and must. Certain other verbs are sometimes, but not always, classed as modals; these include ought, had better, and (in certain uses) dare and need. Verbs which share only some of the characteristics of the principal modals are sometimes called "quasi-modals", "semi-modals", or "pseudo-modals".

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  1. R

    TWO PLUMBERS CANNOT RESOLVE A PROBLEM

    This sounds like an examination question but it really is a problem two different plumbers have been unable to resolve after spending several hours studying my hot water system. My flat has a vented hot water system supplying hot water to the kitchen and bathroom taps. The pump is a Stuart...
  2. L

    Cannot undo supatap washer

    Hi. Husband and I, both 85, have done our own plumbing all our 52 years married but are finding it harder now to get under sinks etc.!! Our current problem is a sixty year old supatap in kitchen sink. It has not needed attention for many years but is now dripping badly.We are unable to unscrew...
  3. C

    I CANNOT VIEW THE FORUM WITHOUT ONSCREEN ADVERTS OBSCURING WEBPAGE

    Hello All, I know that this is a question for a Forum Moderator and probably should be posted in a section about the Forum itself but I was hoping to get some replies from Members about whether this is happening to anyone else: When I logged into the Forum this afternoon and went to look down...
  4. Jmiller7

    Cannot remove tap head

    Has anyone seen tap heads like these? Trawled the internet cannot find anything similar, after removing the grub screw I cannot for the life of me lift the tap head off tried prying with screwdriver but too scared to use excessive force and break the tap
  5. Benjpharris

    Cannot get Timeguard TRT036 to work heating

    Hello, I live in a house with a Timeguard TRT036 timer which appears to not be working correctly…or I’m doing something wrong. I’ve followed all instructions for setting the clock and 7 day times on and off. However I should be able to override the times by setting to ‘Always on’. This seems...
  6. 5

    Cannot ventilate en suite.

    Can anyone help with this please? I have had a bedroom and en suite installed in what was loft space above my garage. Unfortunately there is no way to run the ventilation ducting from the extractor fan into the main roof to access the ventilation tiles. Due to steels/roofing timbers, at most...
  7. S

    Cannot turn towel rail off

    I have a heated towel rail in both the upstairs and the downstairs bathroom. The one upstairs is super hot all of the time. I bought the house a year ago and I knew this radiator was plumbed into the hot water but I only have the hot water coming on in the mornings but this towel rail stays...
  8. josh381991

    Cannot get my heating timer to work!

    Hello, Newbie here, appreciate the help in advance. Moved into a new property last year and kind of forgot about the problem over the summer and with life. Now its getting chilly again the problem has re surfaced so hoping to get some advice. I have a combi boiler with a Drayton Lifestyle...
  9. S

    Evidence of Water leak near boiler, but cannot comprehend where from***

    Hello. Our boiler is a combi, installed 2 years ago. Ground floor, above stopcock. No general concerns about the boiler itself, but there is a giant wet patch nearby that seems to have quickly grown, which points to a leak. There is no water damage on any other wall, and I have not lost water...
  10. J

    Cannot remove tap cover

    My Millenia basin taps have a slightly domed cover to remove to get at the tap washers etc. However I have tried with a fine blade to prize off the top without success? Any ideas? Thanks
  11. T

    Cannot remove cartridge from tap handle.

    Hi, I hope someone can help or point me in the right direction. We have a leaky kitchen mixer tap. I thought it would be a straight-forward cartridge change but I'm having difficulties removing the actual cartridge from the tap handle. I unscrewed the tap handle from the mixer unit, expecting...
  12. W

    Cannot remove handle Assembly on a Bristan Rio

    I have a Bristan Easyfit Rio Basin tap assembly, and I have a drip which more than likely means that the ceramic valve needs cleaning or replacing, however after removing the screw in the top of the handle I cannot get the handle assembly off, I'm using WD40 and tapping it gently with a small...
  13. M

    Is it possible that a radiator cannot be turned off?

    We just bought a big house and the radiators are controlled centrally, as you'd expect, but it doesn't appear that the knobs adjust the heat output so we can't heat the house piecemeal. We intend on re-plumbing the house but this is a huge problem in the interim. Thanks.
  14. G

    Cannot top up boiler pressure

    Hello, (Images removed. Please add them in a reply post directly to the forum.) Please see the linked gallery with more details about the problem. Basically I can't figure out how to top up the pressure. Any help would be much appreciated! For some reason I can't get the imgur gallery...
  15. D

    Cannot remove kitchen mixer tap spout

    Hi A while ago I replaced the o rings in my kitchen mixer tap spout....simply by removing the grub screw at the back of the spout and removing it in seconds. BUT I tried to do the same job on a friends mixer tap which is leaking from the bottom of the spout where it meets the base. HOWEVER...
  16. T

    USA Cleanout problem... cannot open cleanout to get to drain obstruction.

    I have an obstruction in a drain pipe. Plumbing was new with the house 65 years ago, and the particular cleanout I need to open has not been opened in all that time. I put a wrench on the plug expecting it to come out. Instead, the plug remains firmly seated in the flange, and the flange...
  17. T

    Loose toilet seat cannot get it to tighten

    Just bought a property and having problems with a loose toilet seat. There are Allen screws keeping the seat in place but if I try to tighten them it’s still loose. Is it a toilet that needs removing to gain access to the underside in order to tighten the seat?
  18. April Banawa

    Roman bath nightmare, cannot fix the leak

    Hi all!! Deperately in need of some help from someone in the know. I have recently had my whole house refurbished and put a roman/ tiled bath on the first floor. It has been nothing but grief. Everyone is pointing fingers but I need a solution. The area has been tanked twice but it's still...
  19. K

    Cannot find water shut off

    So we have had a hissing toilet for ages but for the life of me I cannot find the shutoff valve. Im assuming its the file valve seal thats faulty. There is a chance that the valve is outside on the street. What would I be looking for if it is. There is a small metal cover outside but I dont wont...
  20. S

    Main water valve, cannot find it

    Hi there, I have just bought a flat in an old tenement building in Edinburgh. I was trying to close the cold and hot water for the tap in the kitchen so i searched underneath the sink, but there are no valves attached to the two pipes that go in the tap. I have followed the pipes and they go...
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