In Common errors^x, Singular nouns^x

Casual/Old I hate these knid of mistake! Formal I hate these knids of mistakes! Formal I hate this knid of mistake! 1. Some grammar books say only these kind of + singular noun is correct. These kind of mistake? If it sounds strange to your ears, you are probably right. Well, it is an old...

Dear sir, I have some inquiries about the choice of noun form (singular or plural) to be used with a plural possessive determiners (their, our, etc.) I have sought the advice of some native speakers on the following 4 sentences only to become more confused as they have different opinions. It is...