为什么要用is

为什么要用is She is very young.这里为什么要用is there is some milk为什么要用is Is this your sister 答语为什么要用it is. Tom family is eating lunch 为什么要用is what is his father like?为什么要用is their chinese is not very good为什么要用is The bus is leaving soon为什么要用is leaving? Where is your book 为什么系动词要用is he is got the flu这里为什么要用is What is this in english?为什么要用What is 为什么要用 is like 的原因 为什么用is? 为什么这里用is? Is this you pencil 为什么不能回答 yes,this is.而是要用Yes,it is. Who is your math teacher?Mr.Wang is.句末为什么要用“is”? Alica is learning / french.she is suae french is a useful language 为什么要用/ a everything is ok为什么要加is