Just need clarification that these sentences are right

by **Guest** Sun Nov 11, 2007 10:09 pm

Not one of the boys has cleaned his room.
None of the boys have cleaned their rooms. (follows SANAM)
I see that one of the boys has started his homework.
I see that no one has started his or her homework yet.
One of the boys who were playing in the park has lost his cap.

One of the factors that keep the housing market bubble alive is irrational exuberance.

Detailed explanations are not necessary. I just need confirmation that I am on the right track.

by **StaceyKoprince** Mon Nov 12, 2007 10:53 pm

Not one of the boys has cleaned his room. YES
None of the boys have cleaned their rooms. (follows SANAM) YES
I see that one of the boys has started his homework. YES
I see that no one has started his or her homework yet. YES
One of the boys who were playing in the park has lost his cap. YES

One of the factors that keep the housing market bubble alive is irrational exuberance. YES

Nice!