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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. mbc0

    Cannot get new radiator to heat up?

    Hi, I have just replaced an old radiator with a new Revive 500h x 1100l Double Premium Radiator (P+) but cannot get it to heat up? The right hand pipe gets very very hot but it does not flow through the radiator. when I drained down the system (I had other radiators to replace and pipework to...
  2. G

    Cannot get shower riser rail off

    Hi there. I got this shower from b and q and the shower head holder is slipping. My plumber put it in so I don't know how it fits together and I can't get it off ( I don't want to force it). I am guessing that the top or bottom bracket will come off. I asked at b and q but they couldn't help...
  3. M

    Cannot get rid of air in rads and pipes

    Hi. I posted a few weeks ago because after my central heating system was drained and leaking valves repaired, I could hear the sound of water gushing and coursing through my rads and pipes. The really helpful forum advice was that there must be air in the system and to keep bleeding the rads...
  4. L

    Ravenheat cs80 boiler. Cannot rest boiler

    Hi A family member accidentally let out too much air when she was bleeding the radiators this morning which prompted an Error 08e on the ravenheat cs80/90 display and no hot water or heating throughout the house. Reading advice online, I was told to press the reset button on the panel however...
  5. D

    CANNOT REMOVE TAP HANDLE HEAD (BONNET TYPE)

    Hi! In the past I have simply removed the cover and centre screw and lifted off the tap handle head to change the washer/mechanism. BUT the one in my flat simply won`t budge!!!. I have removed the top cover and centre screw. I have even bought a TAP HANDLE PULLER ..still no joy it`s as solid as...
  6. M

    Cannot fill my closed loop heating system

    I am having a strange problem trying to repressurise my closed loop system. I believe there is a (small?) underground leak in the system as the pressure regularly drops. Typically takes a few days So regularly I repressure the loop with a feed valve. There is a pressure meter near the feed...
  7. D

    Cannot find toilet seats with 270mm gap between hinges?

    Hi all, I hope you can help please? I am having real difficulty finding soft close D-shape toilet seats which accommodate a gap of 270mm between the hinge screws. I have checked on plumbing sites, Amazon, eBay with no joy - even the adjustable ones just don't seem to allow a gap that wide. Any...
  8. T

    Cannot refill boiler

    Hi All Hopefully somebody here can help me as my regular plumber keeps letting me down I have a Vaillant ecotec plus 837 boiler and I caanot get it to refill. I emptyed the system to install a new radiator valve but when I tried to refill the system its not doing anything. I have turned both...
  9. P

    People cannot use their phones when trying to show you something

    Have you noticed that people are a total whizkid when it comes to using their phones but when they want to show you something they suddenly turn into a illiterate caveman, bashing at the screen with a finger "ooh no ive opened up my caluculator, ooh no I've just turned off screeen rotation...ooh...
  10. S

    Condensate cannot go into Foul Drains when a Septic Tank is used

    Just a 'Heads Up'. Condensate from Condensing Boilers MUST NOT be drained into Foul Drains when a septic tank or sewage treatment plant is part of the foul drainage system. The condensate kills the bacteria in the tanks due to its high acidity and the sewage treatment stops working.
  11. 3

    Wolf Boiler CGB-K-20

    Hi, First time poster, so please be gentle!. I have been having problems with my Wolf Boiler for the last 4 years (usually over winter) but cannot seem to get anyone out who knows how to fix the problems (I've had 4 different local plumbers who have probably had nye on 100 years experience...
  12. Last Plumber

    Cannot open pics !!

    I cannot seem to open the vast majority of images that are posted. Does anyone else have this trouble or is it just me ?
  13. C

    When i click onto photos i cannot view them - my screen just goes darker

    Hello All, When I access the Forum using Internet Explorer 11 and I click onto photos attached to Members message instead being able to view them my Computer screen just goes really dark. I could not attach a Screenshot of this because I do not have the Permission to Post attachments - could...
  14. D

    Bristan Quest basin tap

    I fitted a set of these taps two years ago and now the cold tap is dripping.I have a replacement cartridge ready to fit. Problem being that I cannot remove the lever handle to get to the cartridge. I know it is push/pull fit as iI removed it when fitting but just cannot get it to budge now. I...
  15. M

    Cannot post a URL nor attach a file

    The guys on here are really helping but I'm handicapped at the moment... Can a mod or admin advise why I can't post a link? When I try to post it says... The following errors occurred with your submission Post denied. New posts are limited by number of URLs it may contain and checked...
  16. W

    If I cannot tighten a compression joint quite enough..

    On 3/4 pipe, with a new 3/4 olive (brass, not copper alas) under a bath, on the further away of the two feeds, with bugger all space between wall, pipes and bath, using grips, tap spanner, adjustables, jaw dropper, no matter how many blood vessels I burst, are you guys all going to hand on heart...
  17. T

    Cannot stop slow leak...

    Hi there, I'm trying to finishing plumbing in a shower valve but there's one fitting that I just cannot seem to get to stop leaking (albeit very slowly...two single drops in 24 hours). I've changed fittings three times, I first used PTFE tape and now jointing compound but still can't get it to...
  18. S

    longest length of hot water pipe in a commercial building

    What is the longest length of hot water pipe feeding a tap allowed with out a secondary return,saw a guideline of achieving 50c within 30 secs,this was only a guide not mandatory..cannot access PDF ,bug on pc..
    • sheff paul
    • Thread
    • building cannot commercial hot hot water images length pipe shaun water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  19. S

    Franke Davos cold handle stuck cannot replace valve

    This is a job I've done before. Once you remove the cap and screw the handle should pull off but this one is firmly stuck in place. I've tried gentle heat and also reasonable force. It's a soft water area so limescale shouldn't be a problem. Any suggestions?
  20. G

    Hidden Floor Fixing on Tavistock Ion WC Pan - Plumbers says it cannot be used.

    A plumber has installed a Tavistock Ion open backed closed coupled WC in my bathroom. This is part of a full bathroom refurbishment so the plumber has installed the above floor soil pipe from the soil stack. The plumber has also routed pipes below the suspended weyroc floor. There is no electric...
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