记住一些单词的特殊语法点，如有些名词是不可数的，有些名词只有复数形式的等等。

Note any grammatical characteristics of the words you are studying. For example, note when a verb is irregular and when a noun is uncountable or is only used in the plural.

youdao

这个单词只有单数形式，没有复数形式。

This noun appears in the singular form, never in the plural form.

youdao

至今我只有一次发现这个词用复数形式。

I've as yet only once lighted on use of the word in the plural.

youdao

至今我只有一次发现这个词用复数形式。

I've as yet only once lighted on use of the word in the plural.

youdao