英文動詞的單複數要怎麼判斷?

the +形容詞＝複數名詞 (在文言文中使用）
The rich (=Rich people) are not always happy.
Think of the poor, the old and the sick.=要顧及窮人，老人和病人。

但the deceased (故人）或the accused（被告）是單數名詞

成對的兩形容詞如作名詞，可省去冠詞the
Rich and poor, young and old were gathered there.
貧富老幼都聚集在那裡。

the +形容詞＝抽象名詞
the true = truth
the false = falsehood

see p.176
柯旗化《新英文法》第一出版社印行

1，集体名詞可用單,複數動詞，要視你需表達意思。本句The poor need some help.指所有窮人都需幫助，但The poor needs some help.就單指這窮人需幫助。
2，我再舉一例，如The family are all healthy.指家族內的人均健康   VS The family is the big one of the three.此處指三個家族中最大的一個
3，本句因為未尃指一個窮人，所以一般用複數

The poor have very little money for basic needs.
China is among the poorer countries of the world.
Some nouns have the same form in plural as in singular
Some nouns have no plural forms.
Some nouns look plural but are singular.
Some nouns are always plural
Warning:-Some nouns look singular but have a plural meaning:-eg:-the rich;rich; poor.(20 marks demanded!)

英文動詞的單複數

以主詞來決定

The poor need some help.的The poor

表示窮人

整句 窮人需要幫忙

一般而言

 窮人都需要幫忙

社會上窮人很多

所以是複數