noneof后用单数复数
none of的意思是“……当中没有一个(一点)”,none of与复数名词、代词或单数集合名词连用时,动词用单数或复数均可。但如果与不可数名词连用时,谓语动词肯定要用单数。

(1)None of the work was done.
那些工作全都未干。
(2)None of the trains is/are going to London.
这些列车都不去伦敦。
(3)None of her family has/have been to college.
她的一家谁都没上过大学。
(4)None of the money was paid to me.
连一分钱也没有付给我。
(5)None of us have / has ever been abroad.
我们中没有人去过国外。
none可用来回答How many/much...?的特殊疑问句。(1)-How many birds are there in the tree?-None.
-树上有几只鸟?-一只都没有。
(2)-How much water is there in the glass?-None.
-玻璃杯里有多少水?-没有水。
