大师作文网Is she doing an experiment?（变成复数句子）
Is she doing an experiment?（变成复数句子）
She is doing her homework.（改为复数句子）
she is an American,and he is Einglish.（变成复数）
she is doing her homework改为复数句子
She is doing her homework 改为复数句子
连词成句 experiment doing an he is
she is an english woman 改成复数句子
She is doing her homework.改为复数
（单数句子变成复数） 1.This is a map.2.That's an orange orange.3.—What
This is an orange(变成复数形式)
That is an English book变成复数
we are doing an experiment是什么意思