***** NOT A TEACHER *****
How can I know the adjective is either gradable or ungradable.
Thanks in advance.
Ok. what about sizeable? I suppose that it's gradable adjective, isn't it?
In that an object can have a range of sizes, it must be. But it's not a very useful adjective for the word. It doesn't make much sense to say that something is 'extremely sizeable'. On the other hand you could say something was 'quite sizeable' or 'fairly sizeable' - post #2 got it right: use your common.