essome可用修辞可数和 ?名词，常用于肯定；否定句和疑问句中一般用?不可数否定和一般疑问句中用anya set of 后接可数名词?，“a set of+名词”作主语时，谓词动词的单复数由set的形式来决定。do 是助动词，无意义，辅助实义动词构成?A set of 后面一般接复数的名词，可数不可数都可以A set of keys
A set of methodwhat does he do?
What do you do??do?He doesn't watch tv on Monday.I don't watch tv on Monday.可以说中文吗搭配实义动词there are some keys 改为否定句there is some bread改为一般疑问句There aren't any keysIs there any breadmust是情态动词，后面接?原形