1. I understand "the elderly" refers to a group of old people. When we use this term, should it be "the elderly is" or "the elderly are"?
Does it apply to other cases like "the handicapped" and "the poor"?
2. Are "any" and "no" followed by a singular noun or a plural noun?
3. Is "this pair of trousers" followed by "cost" or costs"? When we use phrases like "this pair", "a dozen", does the verb in the sentence refer to the "a pair" such that we use "costs", or "trousers" such that we use "cost?
4. It is often heard people say "It is no good" or "It is no use". I would like to know what is the usage of this sentence pattern "It is NO (a noun)"?
For me, I am used to say "it is NOT useful" or "THERE is no use crying". Are all the them correct and refer to the same thing?
THANKS.