1.This is my new backpack.改為復(fù)數(shù)句
These are our new backpacks.
2.They're my aunts.改為單數(shù)句
He is my aunt.
3.Those are my CD.(對(duì)my CD提問(wèn)）
WhoseCD are those?
祝你開(kāi)心如意!最后一個(gè)為什么要加CD呢？whose誰(shuí)的，作定語(yǔ)。用它的話，后面必須要加被修飾的名詞。當(dāng)然，這一句話，最好用這樣的提問(wèn)方式——What are those?第一題，改為復(fù)數(shù)句，句中必須有一個(gè)my,這應(yīng)該怎么改呢這些復(fù)數(shù)詞對(duì)應(yīng)如下：Thisismy new backpack這個(gè)是我的（一個(gè)）新背包。Theseare ournewbackpack這些是我們的（很多）新 背包。完全變?yōu)樨?fù)數(shù)句子，其中就不能再用my,它已經(jīng)變?yōu)榱藢?duì)應(yīng)復(fù)數(shù)our。