12) 英語(yǔ)中的"單數(shù)"

1.主語(yǔ)的第三人稱單數(shù)形式，即可用"he,she,it"代替的。如：

he,she, it，my friend, his teacher, our classroom, Tom, Mary’s uncle

2.名詞有單數(shù)名詞和復(fù)數(shù)名詞。如：

man(單數(shù))---men(復(fù)數(shù)) banana(單數(shù))---bananas(復(fù)數(shù))

3.動(dòng)詞有原形，第三人稱單數(shù)形式，-ing分詞，過(guò)去式，過(guò)去分詞。如：

go---goes---going---went---gone

work---works---working---worked---worked

watch---watches---watching---watched---watched

當(dāng)主語(yǔ)為第三人稱單數(shù)的時(shí)候，謂語(yǔ)動(dòng)詞必須用相應(yīng)的第三人稱單數(shù)形式。

如：

The boy wants to be a sales assistant.

Our English teacher is from the US.

Their daughter makes her breakfast all by herself.