Singular form
例子
The word " dog " is in its singular form, while " dogs " is plural.
单词“狗”是单数形式，而“狗”是复数形式。
In English, verbs often change depending on whether the subject is in singular form or plural form.
在英语中，动词经常根据主语是单数形式还是复数形式而变化。
