something做主语可用于否定句吗

肯定句用some,1否定句2疑问句3条件状语从句4表示任何一个用any,
1表示建议或请求2期望得到肯定回答时必须用some something 用于肯定句,anything 用于否定句和疑问句.
在表示一种请求时,渴望得到对方的肯定回答,即使句子是
否定,也要用something或 some等
1.You look hungry.Don't you have ____ to eat?
A.something
B.anything
C.nothing
D.everything
答案给的B
2.-Haven't you forgotten _____?- _____?Oh,I forgot my bag.
A.anything,Excuse me
B.something,Excuse me
C.somthing,Pardon
D.everything,Pardon
答案给的是C
一般地something 用于肯定句;在否定句,疑问句,条件状语从句中用anything ;
something 用在问句中是表示建议或请求,期望得到肯定回答或者所问问题可能性很大时.