One of the fundamental rules of grammar is that the parts of a sentence should agree with each other.

It's easier to demonstrate than to define agreement.


Agreement is usually instinctive in native English speakers. In "I has a minute," the verb "has" doesn't agree with the subject "I". We would say "I have." In "John got their briefcase," assuming John got his own briefcase, "their" should be "his". It's obvious.

Only rarely does it get tricky. A plural noun right in front of the singular verb can throw you off. Consider "Any one of the articles are available": the verb are shouldn't agree with articles, but with the subject, one: the sentence should read, "Any one of the articles is available."

In our case "Is Merecedes too troublesome?" the verb "is" doesn't agree with the subject "Mercedes". If he is referring to the company "Mercedes" it would be correct, but he is referring to Mercedes automobiles (plural). The word "automobiles" is understood, so it is omitted. Since he is referring to Mercedes automobiles as troublesome, the title should be:

"Are Mercedes too troublesome?"

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".