if anyone is late为什么不能是if someone is late?If_ anyone_ is late,the teacher will punish him or her.还有是不是everyone,anyone,someone,都用is,看成单数形式呢?

if anyone is late为什么不能是if someone is late?If_ anyone_ is late,the teacher will punish him or her.还有是不是everyone,anyone,someone,都用is,看成单数形式呢?
if anyone is late为什么不能是if someone is late?
If_ anyone_ is late,the teacher will punish him or her.还有是不是everyone,anyone,someone,都用is,看成单数形式呢?

if anyone is late为什么不能是if someone is late?If_ anyone_ is late,the teacher will punish him or her.还有是不是everyone,anyone,someone,都用is,看成单数形式呢?
是啊,所有这类词都看成第三人称单数,条件状语从句用anyone,这是规定