当陈述部分的主语是this,that,these,those时,疑问部分的主语分别用it和they.
当陈述部分的主语是everything,something,anything,nothing时,疑问部分的主语采用it
当陈述部分的主语是everybody,everyone,somebody,someone,nobody,no one等合成代词时,疑问部分的主语要采用they,有时用he.
1 this is a new house ,is it?NO,it's old.
2 that is a big truck ,is it?Yes,it is.
3 this isn't a new desk,is it?No ,it isn't.
4 that isn't train,is it?No,this is plane.
5.this is cotton,is it?No,this is silk.
6 that isn't water ,is it?No,this is oil. 当陈述部分的主语是this,that,these,those时,疑问部分的主语分别用it和they.
当陈述部分的主语是everything,something,anything,nothing时,疑问部分的主语采用it
当陈述部分的主语是everybody,everyone,somebody,someone,nobody,no one等合成代词时,疑问部分的主语要采用they,有时用he.
1 this is a new house ,is it?NO,it's old.
2 that is a big truck ,is it?Yes,it is.
3 this isn't a new desk,is it?No ,it isn't.
4 that isn't train,is it?No,this is plane.
5.this is cotton,is it?No,this is silk.
6 that isn't water ,is it?No,this is oil.